# Awesome C | Massive Resources & Collection ⭐ **URL:** \ **Category:** Give-Away and Freebies\ **Tags:** tools, freebies\ **Created:** [February 9, 2021, 11:31am UTC](https://onehack.st/t/awesome-c-massive-resources-collection/172246 "2021-02-09T11:31:28Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Aina](https://onehack.st/user_avatar/onehack.st/aina/32/167469_2.png) [@Aina](https://onehack.st/u/Aina)\ **Post date:** [February 9, 2021, 11:31am UTC](https://onehack.st/t/awesome-c-massive-resources-collection/172246/1 "2021-02-09T11:31:28Z")
![image](https://onehack.st/uploads/default/original/3X/3/0/300048e210a0080db5f4abf8c2f341f3a410a9e3.png) # Awesome C ![image](https://onehack.st/uploads/default/original/3X/4/b/4b40d927347f9cc7a1c1d4cf1941b98e3186dede.png) A curated list of C good stuff. This list contains _only_ [open source](https://opensource.org/osd) code (as defined by the linked Open Source Definition), and sellers who aren’t evil for physical resources. This is released under a Creative Commons-Attribution-ShareAlike license, version 4 (SPDX code `CC-BY-SA-4.0`). You can find its text in the LICENSE file. **An important note:** This project does _not_ index anything C+±related; only pure C stuff is considered. **Note for contributors:** If you want to make a pull request, please read CONTRIBUTING.md first. ## Contents - AI - Benchmarking - Build Systems - Compilers - Compression - Concurrency and Parallelism - Crypto - Database - Data Structures - Debugging - Documentation Generation - Editors - Frameworks - Game Programming - Graphics - Graphical User Interface - Hashing - Learning, Reference and Tutorials - Reference resources online - Beginner resources online - Intermediate resources online - Advanced resources online - Online self-study courses - Reference books - Beginner books - Intermediate books - Advanced books - Lexing and Parsing - Memory Management - Multimedia - Networking and Internet - Numerical - Profiling - Regex - Serialization - Source Code Collections - Standard Libraries - String Manipulation - Structured File Processing - CSV - JSON - INI - Others - XML - YAML - Testing - Text Editor Extensions - Tools - Utilities - Web Frameworks - Windows Environments ## AI Computer vision, neural nets, machine learning, and other similar things. Basically, if your university calls it AI, it lives here. - [ccv](http://libccv.org/) - C-based/Cached/Core Computer Vision library; modern computer vision. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [Cranium](https://100.github.io/Cranium/) - Portable, header-only ANN library in C99. [`MIT`](https://spdx.org/licenses/MIT.html) - [FANN](http://leenissen.dk/fann/wp/) - Fast Artifical Neural Network library; an implementation of neural networks. [`GPL-2.0-only`](https://spdx.org/licenses/GPL-2.0-only.html) - [Genann](https://codeplea.com/genann) - Simple ANN in C89, without additional dependencies. [`Zlib`](https://spdx.org/licenses/Zlib.html) - [KANN](https://github.com/attractivechaos/kann) - Two-file ANN library. [`MIT`](https://spdx.org/licenses/MIT.html) - [LibDEEP](https://github.com/jppbsi/LibDEEP) - Deep learning library. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) ## Benchmarking Comparing the performance of various subsystems across different chip/system architectures. - [b63](https://github.com/okuvshynov/b63) - Light-weight micro-benchmarking tool for C. [`Apache-2.0`](https://spdx.org/licenses/Apache-2.0.html) ## Build Systems Tools that automate the building and testing of projects in C. - [CMake](https://cmake.org/) - Cross-platform family of tools designed to build, package and test software. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [GNU Make](https://www.gnu.org/software/make/) - Tool which controls the generation of executables and other non-source files of a program. [`GPL-3.0-or-later`](https://spdx.org/licenses/GPL-3.0-or-later.html) - [Meson](https://mesonbuild.com/) - Extremely fast, user-friendly build system. Based on Ninja. [`Apache-2.0`](https://spdx.org/licenses/Apache-2.0.html) - [Premake](https://github.com/premake/premake-core) - Command-line utility which reads a scripted definition of a software project and uses it to generate project files for Visual Studio and GNU Make. Other targets are also being worked on. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [SCons](https://www.scons.org/) - Software construction tool using Python. [`MIT`](https://spdx.org/licenses/MIT.html) - [xmake](https://xmake.io/) - Cross-platform build utility. [`Apache-2.0`](https://spdx.org/licenses/Apache-2.0.html) - [zproject](https://github.com/zeromq/zproject) - Project generator and build system support tool. [`MPL-2.0`](https://spdx.org/licenses/MPL-2.0.html) ## Compilers Compilers, as well as compiler- and compilation-related tooling. - [ccache](https://ccache.dev/) - Compiler cache designed to speed up recompilation. [`GPL-3.0-or-later`](https://spdx.org/licenses/GPL-3.0-or-later.html) - [Clang](https://clang.llvm.org/) - Compiler for LLVM. Supports C11. [`NCSA`](https://spdx.org/licenses/NCSA.html) - [distcc](https://github.com/distcc/distcc) - Program that allows builds to be distributed among several machines. [`GPL-2.0-or-later`](https://spdx.org/licenses/GPL-2.0-or-later.html) - [Firm](https://pp.ipd.kit.edu/firm/) - Library that provides a graph-based intermediate representation, optimizations and assembly code generation suitable for use in compilers. Comes with an example C front-end under the same license. [`LGPL-2.1-only`](https://spdx.org/licenses/LGPL-2.1-only.html) - [GCC](https://gcc.gnu.org/) - Provides a C compiler as part of its compiler set. Supports C11. [`GPL-3.0-or-later`](https://spdx.org/licenses/GPL-3.0-or-later.html) - [PCC](http://pcc.ludd.ltu.se/) - Venerable compiler. Supports C99. [Various licenses](http://pcc.ludd.ltu.se/licenses/), all open source. ## Compression - [blosc](http://blosc.org/pages/blosc-in-depth) - Extremely fast, multi-threaded, meta-compressor library. Various licenses, all open source. - [Brotli](https://github.com/google/brotli) - General-purpose lossless compression algorithm library. Has speeds comparable to DEFLATE, but much higher compression ratios. [`MIT`](https://spdx.org/licenses/MIT.html). - [clzip](http://lzip.nongnu.org/clzip.html) - C version of the high-quality data compressor [Lzip](http://lzip.nongnu.org/lzip.html) (LZMA implementation). [`GPL-2.0-or-later`](https://spdx.org/licenses/GPL-2.0-or-later.html) - [CRoaring](https://github.com/RoaringBitmap/CRoaring) - C implementation of [Roaring bitmaps](http://roaringbitmap.org/). [`Apache-2.0`](https://spdx.org/licenses/Apache-2.0.html) - [FiniteStateEntropy](https://github.com/Cyan4973/FiniteStateEntropy) - Two highly efficient compression codecs optimized for modern CPUs. [`BSD-2-Clause`](https://spdx.org/licenses/BSD-2-Clause.html) - [DENSITY](https://github.com/centaurean/density) - Super-fast compression library. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [heatshrink](https://github.com/atomicobject/heatshrink) - Data compression/decompression library for embedded and real-time systems. [`ISC`](https://spdx.org/licenses/ISC.html) - [fast\_zlib](https://github.com/gildor2/fast_zlib) - Improved zlib, which runs 2 to 10 times faster. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [huffandpuff](https://github.com/adamierymenko/huffandpuff) - Minimal Huffman encoder and decoder. Public domain. - [libbzip2](http://www.bzip.org/) - Patent-free, high-quality data compression library. [`BSD-4-Clause`](https://spdx.org/licenses/BSD-4-Clause.html) - [Lizard](https://github.com/inikep/lizard) - Formerly LZ5; an efficient compressor with fast decompression. Achieves compression ratios comparable with zip and zlib at decompression speeds of 1000MB/s and faster. [`BSD-2-Clause`](https://spdx.org/licenses/BSD-2-Clause.html) - [lz4](http://lz4.github.io/lz4/) - Library for an extremely fast compression algorithm. [`BSD-2-Clause`](https://spdx.org/licenses/BSD-2-Clause.html) - [lzo](http://www.oberhumer.com/opensource/lzo/) - Fast data compression library. [`GPL-2.0-or-later`](https://spdx.org/licenses/GPL-2.0-or-later.html) - [pixz](https://github.com/vasi/pixz) - Parallel, indexed xz compressor. [`BSD-2-Clause`](https://spdx.org/licenses/BSD-2-Clause.html) - [shoco](http://ed-von-schleck.github.io/shoco) - Compressor for small text strings. [`MIT`](https://spdx.org/licenses/MIT.html) - [SIMDComp](https://github.com/lemire/simdcomp) - Simple library for compressing lists of integers using binary packing. Makes use of SIMD instructions on x86. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [smaz](https://github.com/antirez/smaz) - Efficient string compression library. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [squash](https://github.com/quixdb/squash) - Compression abstraction library, complete with some utilities. [`MIT`](https://spdx.org/licenses/MIT.html) - [TurboPFor](https://github.com/powturbo/TurboPFor) - Fastest integer compression. [`GPL-2.0-or-later`](https://spdx.org/licenses/GPL-2.0-or-later.html) - [TurboRLE](https://github.com/powturbo/TurboRLE) - Most efficient run-length encoding. [`GPL-2.0-or-later`](https://spdx.org/licenses/GPL-2.0-or-later.html) - [zip](https://github.com/kuba--/zip) - Really really small zip archive processing library. [`Unlicense`](https://spdx.org/licenses/Unlicense.html) - [Zlib](http://zlib.net/) - Massively spiffy yet delicately unobtrusive compression library. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [libarchive](https://github.com/libarchive/libarchive) - libarchive is a portable, efficient C library that can read and write streaming archives in a variety of formats. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [zlib-ng](https://github.com/Dead2/zlib-ng) - Zlib replacement with optimizations for ‘next-generation’ systems. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [Zstandard](http://facebook.github.io/zstd/) - Fast, lossless compression algorithm, targeting real-time compression scenarios at zlib-level or better compression ratios. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) ## Concurrency and Parallelism - [cchan](http://repo.hu/projects/cchan/) - Small library for channel constructs for inter-thread communication. Public domain. - [checkedthreads](https://github.com/yosefk/checkedthreads) - A simple library for parallelism, with built-in checking for race conditions. [`BSD-2-Clause`](https://spdx.org/licenses/BSD-2-Clause.html) - [ck](http://concurrencykit.org/) - Concurrency primitives, safe memory reclamation mechanisms and non-blocking data structures. [`BSD-2-Clause`](https://spdx.org/licenses/BSD-2-Clause.html) - [FCFS RWLock](http://www.shlomifish.org/rwlock/) - First-come first-served Readers/Writers lock for POSIX threads. [`CC0-1.0`](https://spdx.org/licenses/CC0-1.0.html) - [libconcurrent](https://github.com/sharow/libconcurrent) - Concurrent programming library, using coroutines, for C11. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [libdill](http://libdill.org/) - Library which makes structured concurrent programming easy. [`MIT`](https://spdx.org/licenses/MIT.html) - [libhl](https://github.com/xant/libhl) - Library implementing a thread-safe API to manage a range of data structures. Also provides some supporting functions and structures for concurrent and lockfree programming. [`LGPL-3.0-only`](https://spdx.org/licenses/LGPL-3.0-only.html) - [liburcu](http://liburcu.org/) - Data synchronization library, which scales linearly with the number of cores. [`LGPL-2.1-or-later`](https://spdx.org/licenses/LGPL-2.1-or-later.html) - [mill](http://libmill.org/) - Go-style concurrency. [`MIT`](https://spdx.org/licenses/MIT.html) - [oclkit](https://github.com/matze/oclkit) - Two-file OpenCL wrapper. [`GPL-3.0-or-later`](https://spdx.org/licenses/GPL-3.0-or-later.html) - [OCL-MLA](http://tuxfan.github.io/ocl-mla/) - OpenCL Mid-Level Abstractions. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [OpenMP](https://www.openmp.org/) - Set of pragmas designed to allow for easy parallelization of code. Standard (licensing not applicable). - [OpenMPI](https://github.com/open-mpi/ompi) - Message passing interface implementation. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [pal](https://github.com/parallella/pal) - Optimized library for maths, parallel processing and data movement. [`Apache-2.0`](https://spdx.org/licenses/Apache-2.0.html) - [pth](https://gnu.org/software/pth/) - Portable implementation for non-preemptive priority-based scheduling for multiple threads of execution. [`GPL-3.0-or-later`](https://spdx.org/licenses/GPL-3.0-or-later.html) - [pthreads](https://en.wikipedia.org/wiki/POSIX_Threads) - POSIX thread library. Standard (no license applicable). - [TinyCThread](https://tinycthread.github.io/) - Portable, small implementation of the C11 threads API. [`Zlib`](https://spdx.org/licenses/Zlib.html) ## Crypto Mostly library implementations of well-known cryptographic algorithms or protocols. - [GNU SASL](https://gnu.org/software/gsasl/) - Implementation of the Simple Authentication and Security Layer and a few common SASL mechanism. [`GPL-3.0-or-later`](https://spdx.org/licenses/GPL-3.0-or-later.html) - [GnuTLS](http://www.gnutls.org/) - Secure communication library, implementing SSL, TLS and DTLS. [`LGPL-2.1-or-later`](https://spdx.org/licenses/LGPL-2.1-or-later.html) - [libgcrypt](https://gnupg.org/related_software/libgcrypt) - General-purpose cryptography library, with a range of available ciphers. [`LGPL-2.1-or-later`](https://spdx.org/licenses/LGPL-2.1-or-later.html) - [OpenSSL](https://www.openssl.org/) - Implementation of the SSL and TLS protocols. Also includes a cryptography library. [Dual Licensed under the OpenSSL License and the SSLeay License](https://www.openssl.org/source/license.html). - [liboqs](https://openquantumsafe.org/) - Library for quantum-resistant cryptographicl algorithms. [`MIT`](https://spdx.org/licenses/MIT.html) - [libsodium](https://download.libsodium.org/doc) - Modern and easy-to-use crypto library. [`MIT`](https://spdx.org/licenses/MIT.html) - [libtomcrypt](https://www.libtom.net/) - Fairly comprehensive, modular and portable cryptographic toolkit. Public domain. - [mbed TLS](https://tls.mbed.org/) - Another crypto implementation. [`Apache-2.0`](https://spdx.org/licenses/Apache-2.0.html) - [MIRACL](https://github.com/miracl/MIRACL) - Multiprecision Integer and Rational Arithmetic Cryptographic Library; an SDK for elliptic curve cryptography. [`AGPL-3.0-or-later`](https://spdx.org/licenses/AGPL-3.0-or-later.html) - [retter](http://maciejczyzewski.me/retter/) - Collection of hash functions, ciphers, tools, libraries and materials related to cryptography and security. Public domain. - [s2n](https://github.com/awslabs/s2n) - C99 implementation of the TLS/SSL protocols, designed to be simple, fast and with security as a priority. [`Apache-2.0`](https://spdx.org/licenses/Apache-2.0.html) - [sphlib](http://www.saphir2.com/sphlib/) - Set of implementations of various hash functions, including several cryptographic ones. [`MIT`](https://spdx.org/licenses/MIT.html) - [trezor-crypto](https://github.com/trezor/trezor-crypto) - Heavily optimized crypto algorithms for embedded devices. [`MIT`](https://spdx.org/licenses/MIT.html) ## Database Databases and data stores with C APIs. - [BerkeleyDB](http://www.oracle.com/us/products/database/berkeley-db) - Library for a high-performance embedded database for key-value data. [`AGPL-3.0-only`](https://spdx.org/licenses/AGPL-3.0-only.html) - [EJDB2](https://ejdb.org/) - Embeddable JSON Database engine. [`MIT`](https://spdx.org/licenses/MIT.html) - [Groonga](https://github.com/groonga/groonga) - Columnar store with full-text search. [`LGPL-2.1-only`](https://spdx.org/licenses/LGPL-2.1-only.html) - [Hiredis](https://github.com/redis/hiredis) - Minimalistic client library for Redis. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [libmongoc](http://mongoc.org/) - High-performance client library for [MongoDB](https://www.mongodb.org/). [`Apache-2.0`](https://spdx.org/licenses/Apache-2.0.html) - [LMDB](https://symas.com/lightning-memory-mapped-database/) - Ultra-fast, ultra-compact key-value embedded data store. [`OLDAP-2.8`](https://spdx.org/licenses/OLDAP-2.8.html) - [MySQL](https://github.com/mysql/mysql-server) - The world’s most popular open source database. [`GPL-2.0-only`](https://spdx.org/licenses/GPL-2.0-only.html) - [PostgreSQL](https://www.postgresql.org/) - Powerful object-relational database system. [`PostgreSQL`](https://spdx.org/licenses/PostgreSQL.html) - [Redis](https://redis.io/) - Advanced key-value store. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [sophia](http://sophia.systems/) - Modern, embeddable key-value database. [`BSD-2-Clause`](https://spdx.org/licenses/BSD-2-Clause.html) - [sparkey](https://github.com/spotify/sparkey) - Simple constant key/value storage library. Designed for read-heavy loads with infrequent, large bulk inserts. [`Apache-2.0`](https://spdx.org/licenses/Apache-2.0.html) - [SQLite](https://www.sqlite.org/) - Self-contained, serverless, zero-configuration, transactional SQL database engine. Public domain. - [UnQLite](https://unqlite.org/) - Self-contained, serverless, zero-configuration, transactional NoSQL engine. [`BSD-2-Clause`](https://spdx.org/licenses/BSD-2-Clause.html) - [WhiteDB](http://whitedb.org/) - Lightweight database library, operating entirely in main memory. [`GPL-3.0-or-later`](https://spdx.org/licenses/GPL-3.0-or-later.html) ## Data Structures - [C-Macro-Collections](https://github.com/LeoVen/C-Macro-Collections) - Generate simple and generic data structures using macros. [`MIT`](https://spdx.org/licenses/MIT.html) - [CLIST](https://github.com/AlexanderAgd/CLIST) - Simple and lightweight [dynamic array](https://en.wikipedia.org/wiki/Dynamic_array) implementation. [`BSD-2-Clause`](https://spdx.org/licenses/BSD-2-Clause.html) - [Collections-C](https://github.com/srdja/Collections-C) - Library of generic data structures. [`LGPL-3.0-or-later`](https://spdx.org/licenses/LGPL-3.0-or-later.html) - [kdtree](https://github.com/jtsiomb/kdtree) - Simple library for working with KD-trees. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [libavl](http://adtinfo.org/libavl.html/index.html) - Library containing a range of self-balancing binary trees. [`GPL-3.0-or-later`](https://spdx.org/licenses/GPL-3.0-or-later.html) - [ds](https://github.com/recp/ds) - Common Data Structures and Algorithms. [`MIT`](https://spdx.org/licenses/MIT.html) - [igraph](https://igraph.org/) - A graph processing library. [`GPL-2.0-or-later`](https://spdx.org/licenses/GPL-2.0-or-later.html) - [liblfds](http://liblfds.org/) - Portable lock-free data structure library. Public domain (more exactly, whatever license you want). - [M\*LIB](https://github.com/P-p-H-d/mlib) - Library for generic, but typesafe C containers. Implemented as header-only. [`BSD-2-Clause`](https://spdx.org/licenses/BSD-2-Clause.html) - [offbrand](https://github.com/theck01/offbrand_lib) - Collection of generic, reference-counted data structures. [`MIT`](https://spdx.org/licenses/MIT.html) - [libsrt](https://faragon.github.io/libsrt.html) - Soft and hard real-time data structures. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html). - [list.h](https://github.com/nbulischeck/list.h) - Implementations for singly linked and doubly linked list functions. [`GPL-3.0-only`](https://spdx.org/licenses/GPL-3.0-only.html) - [PackedArray](https://github.com/gpakosz/PackedArray) - Random-access array of tightly packed unsigned integers of any desired width. Has a SIMD-optimized implementation. [`WTFPL`](https://spdx.org/licenses/WTFPL.html) - [rb3ptr](http://jstimpfle.de/projects/rb3ptr/rb3ptr.html) - Red-Black tree. Exposes almost all implementation primitives, so can be used for scenarios like augmentation, multiple compatible ordering functions, and more. [`MIT`](https://spdx.org/licenses/MIT.html) - [uthash](http://troydhanson.github.io/uthash/) - Single-file hash table implementation. [`BSD-1-Clause`](https://spdx.org/licenses/BSD-1-Clause.html) - [vector.h](https://github.com/swenson/vector.h) - Header library for typed lists. [`MIT`](https://spdx.org/licenses/MIT.html) ## Debugging Because we all have to do it sometimes. Various tools for making debugging easier or better, as well as libraries or code that allows better debugging work. - [C-Reduce](https://embed.cs.utah.edu/creduce/) - Tool that takes a large C file with a property of interest and automatically produces a much smaller C file that has the same property. Intended to help create minimal bug-demonstrating cases in complex code. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [CBMC](https://www.cprover.org/cbmc/) - C Bounded Model Checker; a tool for verification of array bounds, pointer safety and user-specified assertions. [`BSD-4-Clause`](https://spdx.org/licenses/BSD-4-Clause.html) - [cflow](http://www.gnu.org/software/cflow/) - Analyzes a collection of source files and prints a graph charting control flow in the program. [`GPL-3.0-or-later`](https://spdx.org/licenses/GPL-3.0-or-later.html) - [Complexity](https://www.gnu.org/software/complexity/) - Tool for measuring the complexity of source code. [`GPL-3.0-or-later`](https://spdx.org/licenses/GPL-3.0-or-later.html) - [CScout](https://www.spinellis.gr/cscout/) - Source code analyzer and refactoring browser for C programs. [`GPL-3.0-only`](https://spdx.org/licenses/GPL-3.0-only.html) - [DDD](https://www.gnu.org/software/ddd/ddd.html) - Graphical front-end for a range of command-line debuggers. [`GPL-3.0-or-later`](https://spdx.org/licenses/GPL-3.0-or-later.html) - [debug](https://github.com/esneider/debug) - One-header library for easier ‘printf debugging’. [`MIT`](https://spdx.org/licenses/MIT.html) - [ESBMC](http://esbmc.org/) - Efficient SMT-based Bounded Model Checker; a tool for verification of single and multithread programs, user assertions, overflow, and pointer/memory safety. [`Apache-2.0`](https://spdx.org/licenses/Apache-2.0.html) - [GDB](https://www.gnu.org/software/gdb/) - GNU Project debugger. [`GPL-3.0-or-later`](https://spdx.org/licenses/GPL-3.0-or-later.html) - [lldb](https://lldb.llvm.org/) - LLVM debugger. [`NCSA`](https://spdx.org/licenses/NCSA.html) - [rr](https://rr-project.org/) - Debugger that records non-deterministic executions to allow for deterministic debugging. [`BSD-2-Clause`](https://spdx.org/licenses/BSD-2-Clause.html) - [Valgrind](http://www.valgrind.org/) - Range of dynamic analysis tools, including a leak checker. [`GPL-2.0-only`](https://spdx.org/licenses/GPL-2.0-only.html) ## Documentation Generation - [Cxref](http://www.gedanken.org.uk/software/cxref/) - Generates documentation in either LaTeX, HTML, RTF or SGML. [`GPL-2.0-only`](https://spdx.org/licenses/GPL-2.0-only.html) - [DocOnce](https://hplgit.github.io/doconce/doc/web/index.html) - Modestly tagged markup language that can be used to generate a range of formats. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [Doxygen](http://www.doxygen.nl/) - De-facto standard tool for generating documentation from annotated sources. Can generate a large range of formats. [`GPL-2.0-only`](https://spdx.org/licenses/GPL-2.0-only.html) ## Editors Fancier, IDE-type editors. If you want a programmer’s text editor, look elsewhere. Besides, whatever you use most likely supports C anyway. - [Anjuta DevStudio](http://anjuta.org/) - GNOME IDE. [`GPL-2.0-only`](https://spdx.org/licenses/GPL-2.0-only.html) - [Code::Blocks](http://www.codeblocks.org/) - Extendable, configurable IDE supporting C. [`GPL-3.0-only`](https://spdx.org/licenses/GPL-3.0-only.html) - [CodeLite](https://www.codelite.org/) - Cross-platform IDE. [`GPL-2.0-only`](https://spdx.org/licenses/GPL-2.0-only.html) - [Geany](https://www.geany.org/) - Small and fast IDE. [`GPL-2.0-or-later`](https://spdx.org/licenses/GPL-2.0-or-later.html) - [KDevelop](https://www.kdevelop.org/) - KDE IDE. [`GPL-2.0-only`](https://spdx.org/licenses/GPL-2.0-only.html) ## Frameworks Big libraries that provide data structures and other stuff you expect of a ‘modern’ standard library. - [APR](http://apr.apache.org/) - Apache Portable Runtime; another library of cross-platform utility functions. [`Apache-2.0`](https://spdx.org/licenses/Apache-2.0.html) - [C Algorithms](https://fragglet.github.io/c-algorithms) - Collection of common algorithms and data structures. [`ISC`](https://spdx.org/licenses/ISC.html) - [CPL](http://www.eso.org/sci/software/cpl/) - The Common Pipeline Library; a set of libraries designed to be a comprehensive, efficient and robust software toolkit. [`GPL-2.0-only`](https://spdx.org/licenses/GPL-2.0-only.html) - [EFL](https://www.enlightenment.org/) - Large collection of useful data structures and functions. Various licenses, all open source. - [klib](http://attractivechaos.github.io/klib/#About) - Small and lightweight implementations of common algorithms and data structures. [`MIT`](https://spdx.org/licenses/MIT.html) - [libcork](http://libcork.readthedocs.io/en/0.14.0/) - Utility functions and structures, designed for resource-constrained systems. Can be embedded. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [libnih](https://github.com/keybuk/libnih) - Lightweight library of functions and structures. [`GPL-2.0-only`](https://spdx.org/licenses/GPL-2.0-only.html) - [libU](http://www.koanlogic.com/libu/) - Small library of basic utilities, including memory allocation, string manipulation and logging. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [PBL](http://www.mission-base.com/peter/source/) - Large library of utilities, featuring data structures, among other things. [`LGPL-2.1-or-later`](https://spdx.org/licenses/LGPL-2.1-or-later.html) - [qlibc](http://wolkykim.github.io/qlibc) - Simple and powerful library, designed as a replacement for GLib while focusing on being small and light. [`BSD-2-Clause`](https://spdx.org/licenses/BSD-2-Clause.html) - [TBOX](https://github.com/waruqi/tbox) - Multi-platform library with a large number of capabilities. [`Apache-2.0`](https://spdx.org/licenses/Apache-2.0.html) ## Game Programming Engines, libraries and other helpful things specifically for making games. - [Allegro](https://liballeg.org/) - Cross-platform, video game development and multimedia library. [`Zlib`](https://spdx.org/licenses/Zlib.html) - [AssetKit](https://github.com/recp/AssetKit) 🎨 3D asset importer/exporter/util library based on COLLADA/glTF specs [`MIT`](https://spdx.org/licenses/MIT.html) - [cglm](https://github.com/recp/cglm) - 📽 Optimized OpenGL/Graphics Math (glm) for C. [`MIT`](https://spdx.org/licenses/MIT.html) - [Chipmunk2D](http://chipmunk-physics.net/) - Fast and lightweight 2D game physics library. [`MIT`](https://spdx.org/licenses/MIT.html) - [cmt](https://github.com/recp/cmt) - 🎮 C Bindings/Wrappers for Apple’s METAL Graphics Framework. [`MIT`](https://spdx.org/licenses/MIT.html) - [Corange](https://github.com/orangeduck/Corange) - Game engine in pure C. [`BSD-2-Clause`](https://spdx.org/licenses/BSD-2-Clause.html) - [CSFML](https://www.sfml-dev.org/download/csfml/) - Binding for [SFML](https://www.sfml-dev.org/index.php). [`Zlib`](https://spdx.org/licenses/Zlib.html) - [Darkplaces](https://icculus.org/twilight/darkplaces/) - Modified version of the Quake2 engine. [`GPL-2.0-only`](https://spdx.org/licenses/GPL-2.0-only.html) - [Epoxy](https://github.com/anholt/libepoxy) - Library for handling OpenGL function pointer management. [`MIT`](https://spdx.org/licenses/MIT.html) - [Flecs](https://github.com/SanderMertens/flecs) - A Multithreaded Entity Component System written for C89 & C99 [`MIT`](https://spdx.org/licenses/MIT.html) - [Freecell Solver](https://github.com/shlomif/fc-solve) - Set of libraries and command-line programs for automatically solving FreeCell and some similar variants of card Solitaire. [`MIT`](https://spdx.org/licenses/MIT.html) - [FreeGLUT](http://freeglut.sourceforge.net/) - Alternative to the OpenGL Utility Toolkit. Allows the creation and management of windows with OpenGL contexts. [`X11`](https://spdx.org/licenses/X11.html) - [GLFW](https://www.glfw.org/) - Multi-platform library for creating windows with OpenGL contexts. [`Zlib`](https://spdx.org/licenses/Zlib.html) - [ioquake3](https://ioquake3.org/) - Quake3 engine, freed at last. [`GPL-2.0-only`](https://spdx.org/licenses/GPL-2.0-only.html) - [kazmath](https://github.com/Kazade/kazmath) - Maths library for games. [`BSD-2-Clause`](https://spdx.org/licenses/BSD-2-Clause.html) - [libao](https://xiph.org/ao/) - Cross-platform audio library with a wide variety of outputs. [`GPL-2.0-or-later`](https://spdx.org/licenses/GPL-2.0-or-later.html) - [librg](https://github.com/librg/librg) - Pure C99 game networking library for building simple and elegant cross-platform multiplayer client-server solutions. [`Apache-2.0`](https://spdx.org/licenses/Apache-2.0.html) - [MATHC](https://github.com/ferreiradaselva/mathc) - Math library for 2D and 3D programming. [`ZLib`](https://spdx.org/licenses/Zlib.html) - [Orx](http://orx-project.org/) - Portable, lightweight, plugin-based, data-driven, 2D-oriented game engine. [`Zlib`](https://spdx.org/licenses/Zlib.html) - [Quake](https://github.com/id-Software/Quake) - Quake engine. [`GPL-2.0-only`](https://spdx.org/licenses/GPL-2.0-only.html) - [Quake2](https://github.com/id-Software/Quake-2) - Quake2 engine. [`GPL-2.0-only`](https://spdx.org/licenses/GPL-2.0-only.html) - [raylib](https://www.raylib.com/) - Simple and easy-to-use library to learn video game programming. [`Zlib`](https://spdx.org/licenses/Zlib.html) - [RetroArch](https://github.com/libretro/RetroArch) - Reference frontend for [libretro](https://www.libretro.com/). [`GPL-3.0-only`](https://spdx.org/licenses/GPL-3.0-only.html) - [SDL2](https://www.libsdl.org/) - Cross-platform library designed to provide low-level access to audio, keyboard, mouse, joystick and graphics hardware via OpenGL. [`Zlib`](https://spdx.org/licenses/Zlib.html) - [sdl-gpu](https://github.com/grimfang4/sdl-gpu) - Library for high-performance, modern 2D graphics. Based on SDL. [`MIT`](https://spdx.org/licenses/MIT.html) - [SIGIL](http://www.libsigil.com/) - Sound, Input and Graphics Integration Library; a simple alternative to other libraries for doing all those things. Various licenses, all open source. - [uastar](https://github.com/ferreiradaselva/uastar) - Minimal A\* implementation. [`ZLib`](https://spdx.org/licenses/Zlib.html) ## Graphics Programmatic manipulation of graphics in C; if you want to make a GUI, the Graphical User Interface section has what you need. - [AssetKit](https://github.com/recp/AssetKit) 🎨 3D asset importer/exporter/util library based on COLLADA/glTF specs [`MIT`](https://spdx.org/licenses/MIT.html) - [Cairo](http://cairographics.org/) - 2D graphics library. [`LGPL-2.1-only`](https://spdx.org/licenses/LGPL-2.1-only.html) or [`MPL-1.1`](https://spdx.org/licenses/MPL-1.1.html). - [cmt](https://github.com/recp/cmt) - 🎮 C Bindings/Wrappers for Apple’s METAL Graphics Framework. [`MIT`](https://spdx.org/licenses/MIT.html) - [giflib](https://sourceforge.net/projects/giflib/) - Library for reading and writing gif images. [`MIT`](https://spdx.org/licenses/MIT.html) - [graphene](http://ebassi.github.io/graphene/) - Thin layer of graphical data types. [`MIT`](https://spdx.org/licenses/MIT.html) - [heman](https://github.com/prideout/heman) - Tiny library of image utilities dealing with height maps, normal maps, distance fields and the like. [`MIT`](https://spdx.org/licenses/MIT.html) - [libcaca](https://github.com/cacalabs/libcaca) - ASCII renderer for terminal-based interfaces. [`WTFPL`](https://spdx.org/licenses/WTFPL.html) - [libgd](https://github.com/libgd/libgd) - Library for the dynamic creation of images by programmers. [`MIT`](https://spdx.org/licenses/MIT.html) - [libimagequant](https://pngquant.org/lib/) - Small, portable library for high-quality conversion of RGBA images to 8-bit indexed colour images. [`GPL-3.0-or-later`](https://spdx.org/licenses/GPL-3.0-or-later.html) - [libjpeg-turbo](https://libjpeg-turbo.virtualgl.org/) - Faster library for reading and writing JPEG files. [Various licences](https://www.libjpeg-turbo.org/About/License). - [libpng](http://www.libpng.org/) - Official PNG reference library. [`Libpng`](https://spdx.org/licenses/Libpng.html) - [libRSVG](https://wiki.gnome.org/action/show/Projects/LibRsvg?action=show&redirect=LibRsvg) - Library to render SVG files using Cairo. [`LGPL-2.1-or-later`](https://spdx.org/licenses/LGPL-2.1-or-later.html) - [libsixel](https://github.com/saitoha/libsixel) - Library implementing the SIXEL protocol, allowing beautiful graphics in your terminal. [`MIT`](https://spdx.org/licenses/MIT.html) - [libspng](https://libspng.org/) - A simpler interface for reading and writing PNG files. [`BSD-2-Clause`](https://spdx.org/licenses/BSD-2-Clause.html) - [libvips](https://libvips.github.io/libvips/) - Image processing library. [`LGPL-2.1-or-later`](https://spdx.org/licenses/LGPL-2.1-or-later.html) - [libxmi](https://gnu.org/software/libxmi/) - Function library for rasterizing 2D vector graphics. [`GPL-3.0-or-later`](https://spdx.org/licenses/GPL-3.0-or-later.html) - [lightmapper](https://github.com/ands/lightmapper) - Single-file library for lightmap baking, using an existing OpenGL renderer. Public domain. - [mozjpeg](https://github.com/mozilla/mozjpeg) - Improved JPEG encoder. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [nanovg](https://github.com/memononen/nanovg) - Anti-aliased 2D vector drawing library on top of OpenGL, for UI and visualizations. [`Zlib`](https://spdx.org/licenses/Zlib.html) - [OpenGL](https://www.opengl.org/) - Industry standard for high-performance graphics, with a native C binding. [Various licenses](http://www.sgi.com/tech/opengl/?/license.html). ## Graphical User Interface Widget toolkits, or things meant to be used in a similar way to them. - [GTK+](https://www.gtk.org/) - Cross-platform widget toolkit. [`LGPL-2.1-only`](https://spdx.org/licenses/LGPL-2.1-only.html) - [IUP](http://webserver2.tecgraf.puc-rio.br/iup/) - Another cross-platform widget toolkit. [`MIT`](https://spdx.org/licenses/MIT.html) - [nuklear](https://github.com/vurtun/nuklear) - Small, C89, single-header widget toolkit. Public domain. - [tinyfiledialogs](https://sourceforge.net/projects/tinyfiledialogs/) - Single-file library for simple dialogs. Compatible with many other toolkits and OSes. [`Zlib`](https://spdx.org/licenses/Zlib.html) - [Tk](http://www.tcl.tk/) - Basic widget toolkit. Part of Tcl/Tk. [`TCL`](https://spdx.org/licenses/TCL.html) - [XForms Toolkit](http://xforms-toolkit.org/) - Widget toolkit designed for the XWindow system. [`LGPL-2.1-only`](https://spdx.org/licenses/LGPL-2.1-only.html) ## Hashing Hash function implementations for _non_-crypto purposes. Cryptographic hashes can be found in the Crypto section. - [CLHash](https://github.com/lemire/clhash) - Library implementing the ridiculously fast CLHash hashing function. Only works on Intel Haswell or newer. [`Apache-2.0`](https://spdx.org/licenses/Apache-2.0.html) - [HighwayHash](https://github.com/google/highwayhash) - Fast, strong, SIMD-using hash function. Also contains an implementation of SipHash (although this is slower). [`Apache-2.0`](https://spdx.org/licenses/Apache-2.0.html) - [SpookyHash](https://github.com/centaurean/spookyhash) - Extremely fast hash function. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [t1ha](https://github.com/leo-yuriev/t1ha) - Fast Positive Hash - a portable, fast hash function. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [xxHash](http://cyan4973.github.io/xxHash) - Extremely fast hashing algorithm. Comes in 32 and 64-bit varieties. [`BSD-2-Clause`](https://spdx.org/licenses/BSD-2-Clause.html) ## Learning, Reference and Tutorials Resources for learning C programming in general, or something useful relating to C programming. ### Reference resources online - [Benchmarks of the Lockless Memory Allocator](https://locklessinc.com/benchmarks_allocator.shtml) - [C FAQ - comp.lang.c Frequently Asked Questions](http://c-faq.com/) - [Comparison of C/POSIX standard library implementations for Linux](http://www.etalabs.net/compare_libcs.html) - [Draft C89 standard](https://port70.net/~nsz/c/c89/c89-draft.html) - [Draft C99 standard](https://port70.net/~nsz/c/c99/n1256.html) - [Draft C11 standard](https://port70.net/~nsz/c/c11/n1570.html) - [Finding the best 64-bit simulation PRNG](http://nullprogram.com/blog/2017/09/21/) - [SEI CERT C Coding Standard](https://wiki.sei.cmu.edu/confluence/display/c/SEI+CERT+C+Coding+Standard) - [tinyc.game](https://github.com/superjer/tinyc.games) - Tiny C games you can compile and run RIGHT NOW [http://tinyc.games](http://tinyc.games/) [`MIT`](https://spdx.org/licenses/MIT.html) ### Beginner resources online - [A tutorial on pointers](https://pdos.csail.mit.edu/6.828/2017/readings/pointers.pdf) - [A tutorial on portable Makefiles](http://nullprogram.com/blog/2017/08/20/) - [Building C Projects](http://nethack4.org/blog/building-c.html) - [C Programming Wikibook](https://en.wikibooks.org/wiki/C_Programming) - [Introduction to `fun’ C](https://gist.github.com/eatonphil/21b3d6569f24ad164365) - [Learning C with GDB](https://www.recurse.com/blog/5-learning-c-with-gdb) - [memcpy vs memmove](https://web.archive.org/web/20170620131430/https://www.tedunangst.com/flak/post/memcpy-vs-memmove) - [POSIX Threads Programming tutorial](https://computing.llnl.gov/tutorials/pthreads/) (a little dated, but most of it is still valid and useful) - [The GNU C Programming Tutorial](http://www.crasseux.com/books/ctut.pdf) (online PDF) - [Templating in C](http://blog.pkh.me/p/20-templating-in-c.html) - [What a C programmer should know about memory](https://marek.vavrusa.com/memory/) ### Intermediate resources online - [8 gdb tricks you should know](https://blogs.oracle.com/linux/8-gdb-tricks-you-should-know-v2) - [10 C99 tricks](http://blog.noctua-software.com/c-tricks.html) - [A comprehensive MPI tutorial resource](http://mpitutorial.com/) - [Diving into concurrency: trying out mutexes and atomics](https://jvns.ca/blog/2014/12/14/fun-with-threads/) - [Generic C reference counting](https://nullprogram.com/blog/2015/02/17) - [How to write portable C without complicating your build](https://nullprogram.com/blog/2017/03/30) - [Introduction to OpenMP](https://www.youtube.com/playlist?list=PLLX-Q6B8xqZ8n8bwjGdzBJ25X2utwnoEG) (video) - [OpenMP tutorial](https://computing.llnl.gov/tutorials/openMP/) (for the OpenMP3 standard) - [MPI tutorial](https://computing.llnl.gov/tutorials/mpi/) - [Scalable C - Writing Large-Scale Distributed C](https://hintjens.gitbooks.io/scalable-c/content/index.html) - [Some unknown features or tricks in C language](https://proprogramming.org/some-unknown-features-or-tricks-in-c-language/) - [What every C programmer should know about undefined behaviour](http://blog.llvm.org/2011/05/what-every-c-programmer-should-know.html) ### Advanced resources online - [Advanced metaprogramming in C](http://250bpm.com/blog:56) - [A quick tutorial on implementing and debugging malloc, free, calloc, and realloc](http://danluu.com/malloc-tutorial/) - [Bit twiddling hacks](https://graphics.stanford.edu/~seander/bithacks.html) - [I do not know C](https://kukuruku.co/hub/programming/i-do-not-know-c) - [Implementing smart pointers for the C programming language](http://snaipe.me/c/c-smart-pointers/) - [Inline functions in C](http://www.greenend.org.uk/rjk/tech/inline.html) - [Metaprogramming custom control structures in C](https://www.chiark.greenend.org.uk/~sgtatham/mp/) - [Solving the temporary storage problem of C macros](http://www.samnip.ps/thought/macro-storage-for-inverse-comma) - [Some dark corners of C](https://docs.google.com/presentation/d/1h49gY3TSiayLMXYmRMaAEMl05FaJ-Z6jDOWOz3EsqqQ/edit?pli=1#slide=id.gaf50702c_0153) - [Writing efficient C and C code optimization](https://www.codeproject.com/Articles/6154/Writing-Efficient-C-and-C-Code-Optimization) ### Online self-study courses - [C Programming Language Certified Associate preparation course](http://cppinstitute.com/study-resources) ### Reference books - [C: A Reference Manual 5E](https://savedparadigms.files.wordpress.com/2014/09/harbison-s-p-steele-g-l-c-a-reference-manual-5th-ed.pdf) - Full reference book for C99. - [C in a Nutshell 2E](http://shop.oreilly.com/product/0636920033844.do) - Concise reference book for C11. - [C Pocket Reference](http://shop.oreilly.com/product/9780596004361.do) - Concise reference book for C99. - [The C Programming Language 2E](https://en.wikipedia.org/wiki/The_C_Programming_Language) - Original book on C, by its creators. ### Beginner books - [C Primer Plus 6E](https://www.pearson.com/us/higher-education/program/Prata-C-Primer-Plus-6th-Edition/PGM4399.html) - Complete tutorial on programming in C11. - [C Programming: A Modern Approach](http://knking.com/books/c2/index.html) - Excellent book to learn the basics of C. - [Head First C](http://shop.oreilly.com/product/0636920015482.do) - ‘Head-first’ style book for learning C. ### Intermediate books - [21st Century C](http://shop.oreilly.com/product/0636920033677.do) - Good _second_ programming book on C. - [Understanding and Using C Pointers](http://shop.oreilly.com/product/0636920028000.do) - In-depth resource on pointers in C. - [ZeroMQ](http://shop.oreilly.com/product/0636920026136.do) - Book for using ZeroMQ with C. ### Advanced books - [Expert C Programming: Deep C Secrets](https://dl.acm.org/citation.cfm?id=179241) - Interesting, in-depth and entertaining look at the innards of C. ## Lexing and Parsing Libraries specifically for lexical analysis (or lexing) and syntactic analysis (or parsing). - [flex](https://github.com/westes/flex) - Fast lexical analyzer generator. [`BSD-2-Clause`](https://spdx.org/licenses/BSD-2-Clause.html) - [GNU Bison](https://www.gnu.org/software/bison/) - General-purpose parser generator that converts an annotated context-free grammar into a range of parsers. [`GPL-3.0-or-later`](https://spdx.org/licenses/GPL-3.0-or-later.html) - [hammer](https://github.com/abiggerhammer/hammer) - Parser combinators for binary formats. [`GPL-2.0-only`](https://spdx.org/licenses/GPL-2.0-only.html) - [mpc](https://github.com/orangeduck/mpc) - Parser combinator library. [`BSD-2-Clause`](https://spdx.org/licenses/BSD-2-Clause.html) - [re2c](http://re2c.org/index.html) - Lexer generator, producing fast lexers, with access to its internals. Public domain. ## Memory Management Whether a different, faster malloc or outright garbage collection, anything to do with managing C memory lives here. - [Boehm GC](https://www.hboehm.info/gc/) - Garbage collection for C. Various licenses, all open source. - [jemalloc](http://jemalloc.net/) - Malloc implementation that emphasizes avoidance of fragmentation and scalable concurrency support. [`BSD-2-Clause`](https://spdx.org/licenses/BSD-2-Clause.html) - [Lockless Memory Allocator](https://locklessinc.com/) - Efficient memory allocator. [`GPL-3.0-or-later`](https://spdx.org/licenses/GPL-3.0-or-later.html) - [libcsptr](https://github.com/Snaipe/libcsptr) - Smart pointers for C. [`MIT`](https://spdx.org/licenses/MIT.html) - [rpmalloc](https://github.com/rampantpixels/rpmalloc) - Thread-caching, fast memory allocator, naturally aligned on 32-byte boundaries. Public domain. - [talloc](https://talloc.samba.org/talloc/doc/html/index.html) - Hierarchical, reference-counted memory pool system with destructors. [`LGPL-3.0-or-later`](https://spdx.org/licenses/LGPL-3.0-or-later.html) - [tlsf](http://www.gii.upv.es/tlsf/) - Two-Level Segregated Fit allocator; a general-purpose, dynamic memory allocator designed to meet real-time requirements. [Up-to-date implementation](https://github.com/minad/tlsf). [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) ## Multimedia - [aubio](https://github.com/aubio/aubio) - Library for audio and music analysis. [`GPL-3.0-or-later`](https://spdx.org/licenses/GPL-3.0-or-later.html) - [FFMPEG](https://www.ffmpeg.org/) - Complete, cross-platform solution to record, convert and stream audio and video. [`LGPL-2.1-or-later`](https://spdx.org/licenses/LGPL-2.1-or-later.html) - [GStreamer](https://gstreamer.freedesktop.org/) - Framework for audio and visual media. [`LGPL-2.1-or-later`](https://spdx.org/licenses/LGPL-2.1-or-later.html) - [libmpv](https://mpv.io/) - Music-playing library. [`GPL-2.0-or-later`](https://spdx.org/licenses/GPL-2.0-or-later.html) - [libsndfile](http://www.mega-nerd.com/libsndfile/) - Library for reading and writing sound files. Supports many formats. [`LGPL-2.1-only`](https://spdx.org/licenses/LGPL-2.1-only.html) or [`LGPL-3.0-only`](https://spdx.org/licenses/LGPL-3.0-only.html) - [libsoundio](http://libsound.io/) - Library for cross-platform, real-time audio input and output. Has a range of back-ends. [`MIT`](https://spdx.org/licenses/MIT.html) - [libVLC](https://wiki.videolan.org/LibVLC) - Complete multimedia library for audio and video encoding, decoding, playing and streaming. [`GPL-2.0-only`](https://spdx.org/licenses/GPL-2.0-only.html) - [lodepng](https://lodev.org/lodepng/) - Simple PNG image decoder and encoder, requiring no other dependencies. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [minimp3](https://github.com/lieff/minimp3) - Lightweight MP3 decoder single header library. [`CC0-1.0`](https://spdx.org/licenses/CC0-1.0.html) - [Soundpipe](http://paulbatchelor.github.io/proj/soundpipe.html) - Lightweight music DSP library. [`MIT`](https://spdx.org/licenses/MIT.html) ## Networking and Internet Low-level networking and internet-related stuff. If you want something more comprehensive and high-level, you may want the Web Frameworks section. - [asnlc](http://lionet.info/asn1c/compiler.html) - Compiler of ASN.1 specifications into C source code. [`BSD-2-Clause`](https://spdx.org/licenses/BSD-2-Clause.html) - [CHL](https://github.com/it4e/CHL) - C Hypertext Library - A library for writing web applications in C. [`GPL-3.0-only`](https://spdx.org/licenses/GPL-3.0-only.html) - [czmq](http://czmq.zeromq.org/) - High-level binding for ZeroMQ. [`MPL-2.0`](https://spdx.org/licenses/MPL-2.0.html) - [Dyad.c](https://github.com/rxi/dyad) - Lightweight, easy, asynchronous networking library. [`MIT`](https://spdx.org/licenses/MIT.html) - [GNU adns](https://www.gnu.org/software/adns/) - Advanced, easy-to-use, asynch-capable DNS client library and utilities. [`GPL-3.0-or-later`](https://spdx.org/licenses/GPL-3.0-or-later.html) - [gumbo-parser](https://github.com/google/gumbo-parser) - HTML5 parsing library in C99. [`Apache-2.0`](https://spdx.org/licenses/Apache-2.0.html) - [H20](https://h2o.examp1e.net/) - A new-generation HTTP server. [`MIT`](https://spdx.org/licenses/MIT.html) - [http-parser](https://github.com/joyent/http-parser) - HTTP request/response parser. [`MIT`](https://spdx.org/licenses/MIT.html) - [ldns](http://www.nlnetlabs.nl/projects/ldns/index.html) - Library to simplify DNS programming. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [libcurl](https://curl.haxx.se/libcurl/) - Client-side URL transfer library, supporting a wide range of formats. [`curl`](https://spdx.org/licenses/curl.html) - [LibEtPan](http://www.etpan.org/) - Mail library providing an efficient network for IMAP, SMTP, POP and NNTP. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [libev](http://software.schmorp.de/pkg/libev.html) - Yet another event loop. [`BSD-2-Clause`](https://spdx.org/licenses/BSD-2-Clause.html) - [libevent](http://libevent.org/) - Event loop replacement for network servers. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [libhttpd](https://www.hughes.com.au/products/libhttpd/) - Library to add basic web server capabilities to an application or embedded device. [`GPL-2.0-only`](https://spdx.org/licenses/GPL-2.0-only.html) - [libhv](https://github.com/ithewei/libhv) - Cross platform event loop library. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [libidn](https://gnu.org/software/libidn/) - Implementation of the Stringprep, Punycode and IDNA specifications. [`GPL-3.0-or-later`](https://spdx.org/licenses/GPL-3.0-or-later.html) - [libmicrohttpd](https://gnu.org/software/libmicrohttpd/) - Small library that makes it easy to run an HTTP server as part of another application. [`LGPL-2.1-or-later`](https://spdx.org/licenses/LGPL-2.1-or-later.html) - [libonion](https://www.coralbits.com/libonion/) - HTTP server library, designed to be easy to use. [`Apache-2.0`](https://spdx.org/licenses/Apache-2.0.html) - [libquickmail](http://sourceforge.net/projects/libquickmail/) - Library intended to give developers a way to send email from their applications. Supports multiple To/Cc/Bcc recipients and attachments without size limits. [`GPL-3.0-or-later`](https://spdx.org/licenses/GPL-3.0-or-later.html) - [libsagui](https://risoflora.github.io/libsagui/) - Library for cross-platform HTTP servers. [`LGPL-3.0-or-later`](https://spdx.org/licenses/LGPL-3.0-or-later.html) - [LibVNCServer](https://github.com/LibVNC/libvncserver) - Cross-platform libraries to implement VNC server and/or client functionality. [`GPL-2.0-or-later`](https://spdx.org/licenses/GPL-2.0-or-later.html) - [libwebsock](https://github.com/JonnyWhatshisface/libwebsock) - Easy-to-use and powerful web socket library. [`LGPL-3.0-only`](https://spdx.org/licenses/LGPL-3.0-only.html) - [lwan](https://lwan.ws/) - Experimental, scalable, high-performance HTTP server. [`GPL-2.0-only`](https://spdx.org/licenses/GPL-2.0-only.html) - [mongoose](https://cesanta.com/) - Embedded web server. [`GPL-2.0-only`](https://spdx.org/licenses/GPL-2.0-only.html) - [MQTT-C](https://github.com/LiamBindle/MQTT-C) - A portable MQTT C client for embedded systems and PCs alike. [`MIT`](https://spdx.org/licenses/MIT.html) - [nanomsg](https://github.com/nanomsg/nanomsg) - C-based implementation of ZeroMQ. [`MIT`](https://spdx.org/licenses/MIT.html) - [NNG](https://nanomsg.github.io/nng/) - nanomsg-next-generation - lightweight brokerless messaging. [`MIT`](https://spdx.org/licenses/MIT.html) - [oSip](https://gnu.org/software/osip/) - SIP implementation without additional dependencies. [`LGPL-2.1-or-later`](https://spdx.org/licenses/LGPL-2.1-or-later.html) - [socket99](https://github.com/silentbicycle/socket99) - C99 wrapper for the BSD sockets API. [`ISC`](https://spdx.org/licenses/ISC.html) - [twitc](https://github.com/sinemetu1/twitc) - Mini library for interacting with the Twitter OAuth API. [`MIT`](https://spdx.org/licenses/MIT.html) - [uriparser](https://uriparser.github.io/) - Strictly RFC 3986-compliant URI parsing and handling library. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [Wslay](https://tatsuhiro-t.github.io/wslay/) - WebSocket library. Implements version 13 of the WebSocket protocol, as described in RFC 6455. [`MIT`](https://spdx.org/licenses/MIT.html) - [zyre](https://github.com/zeromq/zyre) - Framework for proximity-based peer-to-peer applications. [`MPL-2.0`](https://spdx.org/licenses/MPL-2.0.html) - [libpcap](https://github.com/the-tcpdump-group/libpcap) - API provides to various kernel packet capture mechanism. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) ## Numerical - [apophenia](http://apophenia.info/) - Library for statistical and scientific computing. [`GPL-2.0-only`](https://spdx.org/licenses/GPL-2.0-only.html) - [Arb](https://github.com/fredrik-johansson/arb) - Library for arbitrary-precision interval arithmetic. [`LGPL-2.1-or-later`](https://spdx.org/licenses/LGPL-2.1-or-later.html) - [ATLAS](http://math-atlas.sourceforge.net/) - Automatically Tuned Linear Algebra Software. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [clBLAS](https://github.com/clMathLibraries/clBLAS) - BLAS functions written in OpenCL. [`Apache-2.0`](https://spdx.org/licenses/Apache-2.0.html) - [cmathl](https://scientificc.github.io/cmathl/) - Math library with a great variety of mathematical functions with CMake build support. Seeks to be close to C89/C90 compliant for portability. [`MIT`](https://spdx.org/licenses/MIT.html) - [Cuba](http://www.feynarts.de/cuba/) - Library for multidimensional numerical integration. [`LGPL-3.0-only`](https://spdx.org/licenses/LGPL-3.0-only.html) - [fft-c](https://github.com/adis300/fft-c) - A high-performance Fourier Transform from netlib’s fftpack; wrapped in a user-friendly format [`MIT`][MIT] - [FFTW](http://www.fftw.org/) - The Fastest Fourier Transform in the West; a highly optimized fast Fourier transform routine. [`GPL-2.0-or-later`](https://spdx.org/licenses/GPL-2.0-or-later.html) - [FLINT](http://flintlib.org/) - Fast Library for Number Theory; a library supporting arithmetic with numbers, polynomials, power series and matrices, among others. [`GPL-2.0-or-later`](https://spdx.org/licenses/GPL-2.0-or-later.html) - [GLPK](https://gnu.org/software/glpk/) - GNU Linear Programming Kit; a package designed for solving large-scale linear programming, mixed integer programming and other related problems. [`GPL-3.0-or-later`](https://spdx.org/licenses/GPL-3.0-or-later.html) - [GMP](https://gmplib.org/) - GNU Multple Precision Arithmetic Library; a library for arbitrary-precision arithmetic. [`GPL-2.0-only`](https://spdx.org/licenses/GPL-2.0-only.html) or [`LGPL-3.0-only`](https://spdx.org/licenses/LGPL-3.0-only.html) - [GNU MPC](http://www.multiprecision.org/mpc/) - Library for complex number arithmetic. [`LGPL-3.0-or-later`](https://spdx.org/licenses/LGPL-3.0-or-later.html) - [GNU MPFR](http://mpfr.loria.fr/index.html) - Library for arbitrary-precision floating-point arithmetic. [`LGPL-3.0-or-later`](https://spdx.org/licenses/LGPL-3.0-or-later.html) - [GNU MPRIA](https://gnu.org/software/mpria/) - Portable mathematics library for multi-precision rational interval arithmetic. [`GPL-3.0-or-later`](https://spdx.org/licenses/GPL-3.0-or-later.html) - [GSL](https://www.gnu.org/software/gsl/) - The GNU Scientific Library; a sophisticated numerical library. [`GPL-3.0-only`](https://spdx.org/licenses/GPL-3.0-only.html). - [KISS FFT](https://sourceforge.net/projects/kissfft/) - Simple fast Fourier transform library. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [LAPACKE](http://www.netlib.org/lapack/lapacke.html) - Interface to [LAPACK](http://www.netlib.org/lapack/). [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [LibTomMath](http://www.libtom.net/LibTomMath/) - Portable, number-theoretic, multiple-precision integer library. Supports algebra, digit manipulation, modular reductions, and various number-theoretic routines. Public domain. - [LibTomPoly](http://www.libtom.net/LibTomPoly/) - Polynomial-related maths library. Public domain. - [PARI/GP](http://pari.math.u-bordeaux.fr/) - Computer algebra system for number theory; includes a compiler to C. [`GPL-2.0-or-later`](https://spdx.org/licenses/GPL-2.0-or-later.html) - [PETSc](http://www.mcs.anl.gov/petsc/) - Suite of data structures and routines for scalable parallel solution of scientific applications modelled by partial differential equations. [`BSD-2-Clause`](https://spdx.org/licenses/BSD-2-Clause.html) - [SCS](https://github.com/cvxgrp/scs) - Splitting Conic Solver; a numerical optimization package for solving large-scale convex cone problems. [`MIT`](https://spdx.org/licenses/MIT.html) - [SLEPc](http://slepc.upv.es/) - Library for the solution of large, sparse eigenvalue problems on parallel computers. [`LGPL-3.0-only`](https://spdx.org/licenses/LGPL-3.0-only.html) - [TomsFastMath](http://www.libtom.net/TomsFastMath/) - Set of optimized maths operations (in assembly), suitable for cryptographic use. Public domain. - [Yeppp!](https://bitbucket.org/MDukhan/yeppp) - Fast, SIMD-optimized mathematical library. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) ## Profiling - [gperftools](https://github.com/gperftools/gperftools) - Collection of utilities for measuring and improving performance. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [gprof](https://www.gnu.org/software/binutils/) - Performance analysis tool. Part of GNU binutils. [`GPL-3.0-or-later`](https://spdx.org/licenses/GPL-3.0-or-later.html) - [OProfile](http://oprofile.sourceforge.net/news/) - Statistical profiler for Linux. Can profile any code (including the kernel!) with low overhead and without recompilation. [`GPL-2.0-only`](https://spdx.org/licenses/GPL-2.0-only.html) - [perf](https://perf.wiki.kernel.org/index.php/Main_Page) - Linux kernel-based profiler with a lot of functionality. [`GPL-2.0-only`](https://spdx.org/licenses/GPL-2.0-only.html) ## Regex - [Onigmo](https://github.com/k-takata/Onigmo) - Fork of Oniguruma, supporting more advanced regexps. [`BSD-2-Clause`](https://spdx.org/licenses/BSD-2-Clause.html) - [Oniguruma](https://github.com/kkos/oniguruma) - Regex library supporting a wide range of encodings, and incorporating many security-oriented fixes. [`BSD-2-Clause`](https://spdx.org/licenses/BSD-2-Clause.html) - [PCRE](http://www.pcre.org/) - Implementation of regexes identical to that of Perl 5. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [SLRE](https://github.com/cesanta/slre) - Super Light Regular Expression library; a small implementation of a subset of Perl regex syntax. [`GPL-2.0-only`](https://spdx.org/licenses/GPL-2.0-only.html) - [TRE](https://github.com/laurikari/tre/) - POSIX-compliant, feature-full regex library. [`BSD-2-Clause`](https://spdx.org/licenses/BSD-2-Clause.html) ## Serialization - [binn](https://github.com/liteserver/binn) - Binary serialization format, meant to be compact, fast and easy-to-use. [`Apache-2.0`](https://spdx.org/licenses/Apache-2.0.html) - [c-capnproto](https://github.com/jmckaskill/c-capnproto) - Implementation of the Cap’n Proto serialization protocol. [`MIT`](https://spdx.org/licenses/MIT.html) - [cmp](https://github.com/camgunz/cmp) - Implementation of the [MessagePack](https://msgpack.org/) serialization protocol. [`MIT`](https://spdx.org/licenses/MIT.html) - [flatcc](https://github.com/dvidelabs/flatcc) - [FlatBuffers](https://google.github.io/flatbuffers/) compiler and library. [`Apache-2.0`](https://spdx.org/licenses/Apache-2.0.html) - [libavro](http://avro.apache.org/docs/current/api/c/index.html#_introduction_to_avro_c) - Implementation of the Avro data serialization system. [`Apache-2.0`](https://spdx.org/licenses/Apache-2.0.html) - [mpack](https://github.com/ludocode/mpack) - Another implementation of the [MessagePack](https://msgpack.org/) serialization protocol. [`MIT`](https://spdx.org/licenses/MIT.html) - [OPIC](http://opic.rocks/) - Object Persistence in C; a revolutionary serialization framework, with matching on-disk and in-memory representations. [`GPL-3.0-or-later`](https://spdx.org/licenses/GPL-3.0-or-later.html) - [protobuf-c](https://github.com/protobuf-c/protobuf-c) - Implementation of Google Protocol Buffer. [`BSD-2-Clause`](https://spdx.org/licenses/BSD-2-Clause.html) - [tpl](https://github.com/troydhanson/tpl) - Small binary serialization library. [`MIT`](https://spdx.org/licenses/MIT.html) - [xdr](https://en.wikipedia.org/wiki/External_Data_Representation) - External Data Representation; a standard for data serialization. Standard (no license applicable). - [pbtools](https://github.com/eerimoq/pbtools) - Google Protocol Buffers C source code generator. [`MIT`](https://spdx.org/licenses/MIT.html) ## Source Code Collections Collections of small source code. If you want something big and integrated, check the Frameworks section. - [CCAN](http://ccodearchive.net/) - Modelled after Perl’s CPAN, this is a big collection of code that does stuff. The full list is [here](http://ccodearchive.net/list.html). Various licenses, all open source. - [clib](https://github.com/clibs/clib) - Something of a package manager. Comes with a [bunch of libraries of its own](https://github.com/clibs/clib/wiki/Packages). [`MIT`](https://spdx.org/licenses/MIT.html) - [gnulib](https://www.gnu.org/software/gnulib/) - Collection of common GNU code. Various licenses, all open source. - [libdjb](http://www.fefe.de/djb/) - Collection of libraries doing various things. (Apparently) public domain. - [mmx](https://github.com/vurtun/mmx) - Collection of single-header libraries. Various licenses, all open source. - [par](https://github.com/prideout/par) - Bunch of single-file libraries. [`MIT`](https://spdx.org/licenses/MIT.html) - [Snippets](https://github.com/DanielGibson/Snippets/) - Useful code snippets and header-only libraries. Public domain. - [stb](https://github.com/nothings/stb) - Range of single-file libraries. Public domain. - [tinyheaders](https://github.com/RandyGaul/tinyheaders) - Collection of header-only libraries, primarily oriented toward game development. [`Zlib`](https://spdx.org/licenses/Zlib.html) ## Standard Libraries Implementations of the (standard-mandated) C standard library. - [Bionic](https://github.com/aosp-mirror/platform_bionic) - Google’s standard library, developed for Android. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [cloudlibc](https://github.com/NuxiNL/cloudlibc) - Standard library based on the concept of [capability-based security](https://en.wikipedia.org/wiki/Capability-based_security). [`BSD-2-Clause`](https://spdx.org/licenses/BSD-2-Clause.html) - [dietlibc](https://www.fefe.de/dietlibc/) - Standard library designed for the smallest possible binaries. [`GPL-2.0-only`](https://spdx.org/licenses/GPL-2.0-only.html) - [glibc](https://www.gnu.org/software/libc/) - The GNU C Library; an implementation of the standard library. [`LGPL-2.1-only`](https://spdx.org/licenses/LGPL-2.1-only.html). - [musl](https://musl.libc.org/) - Standard library, compatible with POSIX 2008 and C11. Designed for static linking. [`MIT`](https://spdx.org/licenses/MIT.html) - [PDCLib](http://pdclib.e43.eu/) - The Public Domain C Library. Implements most of C99 and some of C11. [`CC0-1.0`](https://spdx.org/licenses/CC0-1.0.html) - [uClibc-ng](https://uclibc-ng.org/) - Small C library for developing embedded systems. [`LGPL-2.1-or-later`](https://spdx.org/licenses/LGPL-2.1-or-later.html) ## String Manipulation - [bstring](http://mike.steinert.ca/bstring/) - The Better String Library. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [ICU](http://site.icu-project.org/) - International Components for Unicode; a library for Unicode support. [`ICU`](https://spdx.org/licenses/ICU.html) - [levenstein.c](https://github.com/wooorm/levenshtein.c) - [Levenstein distance](https://en.wikipedia.org/wiki/Levenshtein_distance) algorithm implementation. [`MIT`](https://spdx.org/licenses/MIT.html). - [libunistring](https://gnu.org/software/libunistring/) - Library for manipulating Unicode strings. [`LGPL-3.0-only`](https://spdx.org/licenses/LGPL-3.0-only.html) - [libgiconv](https://gnu.org/software/libiconv/) - Text conversion library. [`LGPL-2.1-only`](https://spdx.org/licenses/LGPL-2.1-only.html) - [librope](https://github.com/josephg/librope) - UTF-8 rope (‘heavy’ string) library. [`MIT`](https://spdx.org/licenses/MIT.html) - [SDS](https://github.com/antirez/sds) - Simple Dynamic Strings; a library for handling strings in a simpler way, but one that is compatible with normal C string functions. Available via [clib](https://github.com/clibs/clib). [`BSD-2-Clause`](https://spdx.org/licenses/BSD-2-Clause.html) - [stmr.c](https://github.com/wooorm/stmr.c) - [Porter Stemmer](http://tartarus.org/martin/PorterStemmer/) algorithm implementation. [`MIT`](https://spdx.org/licenses/MIT.html) - [utf8.h](https://github.com/sheredom/utf8.h) - Single-header UTF-8 library, designed to mimic C-style string functions. Public domain. - [utf8proc](https://github.com/JuliaLang/utf8proc) - Library for processing UTF-8 data. [`MIT`](https://spdx.org/licenses/MIT.html) ## Structured File Processing This includes libraries for things like XML, JSON, CSV, and other similar formats. ### CSV - [libcsv](https://github.com/rgamble/libcsv) - Simple, streaming CSV parser. [`LGPL-2.1-or-later`](https://spdx.org/licenses/LGPL-2.1-or-later.html) ### JSON - [Jansson](http://www.digip.org/jansson/) - Library for encoding, decoding and manipulating JSON. [`MIT`](https://spdx.org/licenses/MIT.html) - [jfes](https://github.com/NeonMercury/jfes) - JSON For Embedded Systems; simple JSON engine without any dependencies. [`MIT`](https://spdx.org/licenses/MIT.html) - [jsmn](https://zserge.com/jsmn.html) - Minimalistic JSON parser. [`MIT`](https://spdx.org/licenses/MIT.html) - [json](https://github.com/recp/json) - Simple, low-memory-use JSON parser. [`MIT`](https://spdx.org/licenses/MIT.html) - [json.c](https://github.com/json-c/json-c) - Easily work with JSON in C. Comes with a reference-counted object model, and aims for conformance with [RFC 7159](https://tools.ietf.org/html/rfc7159). [`MIT`](https://spdx.org/licenses/MIT.html) - [json.h](https://github.com/sheredom/json.h) - Single-file non-streaming JSON parser. [`Unlicense`](https://spdx.org/licenses/Unlicense.html) - [parson](https://github.com/kgabis/parson) - Two-file, C89-compatible JSON parser. [`MIT`](https://spdx.org/licenses/MIT.html) - [WJElement](https://github.com/netmail-open/wjelement/) - Advanced JSON manipulation library, with support for JSON Schema. [`LGPL-2.0-or-later`](https://spdx.org/licenses/LGPL-2.0-or-later.html) or [`LGPL-2.1-or-later`](https://spdx.org/licenses/LGPL-2.1-or-later.html) or [`LGPL-3.0-or-later`](https://spdx.org/licenses/LGPL-3.0-or-later.html) - [YAJL](https://lloyd.github.io/yajl/) - Fast streaming JSON parser library. [`ISC`](https://spdx.org/licenses/ISC.html) ### INI - [inih](https://github.com/benhoyt/inih) - Small and simple INI file parser, good for embedded systems. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [iniparser](https://github.com/ndevilla/iniparser) - Parser for .ini files. [`MIT`](https://spdx.org/licenses/MIT.html) - [libconfini](https://madmurphy.github.io/libconfini/html/index.html) - Yet another INI parser. [`GPL-3.0-only`](https://spdx.org/licenses/GPL-3.0-only.html) - [minIni](https://github.com/compuphase/minIni) - Small and portable INI parser. [`Apache-2.0`](https://spdx.org/licenses/Apache-2.0.html) ### Others - [libbson](https://github.com/mongodb/libbson) - BSON utility library. [`Apache-2.0`](https://spdx.org/licenses/Apache-2.0.html) - [libconfuse](https://github.com/martinh/libconfuse) - Small configuration file parser library. [`ISC`](https://spdx.org/licenses/ISC.html) - [libelf](https://github.com/0intro/libelf) - Simple library for parsing ELF files. [`MIT`](https://spdx.org/licenses/MIT.html) - [libucl](https://github.com/vstakhov/libucl) - Universal configuration library parser. [`BSD-2-Clause`](https://spdx.org/licenses/BSD-2-Clause.html) - [libxo](https://github.com/Juniper/libxo) - Allows an application to generate plain text, XML, JSON and HTML output using a common set of function calls. The application decides at runtime what output style should be produced. [`BSD-2-Clause`](https://spdx.org/licenses/BSD-2-Clause.html) ### XML - [Expat](http://expat.sourceforge.net/) - Stream-oriented XML parser. [MIT](https://spdx.org/licenses/MIT.html) - [libxml2](http://xmlsoft.org/) - Standards-compliant, portable XML parser. [MIT](https://spdx.org/licenses/MIT.html) - [xml](https://github.com/recp/xml) - Simple, low-memory-use XML parser / tokenizer. [`MIT`](https://spdx.org/licenses/MIT.html) ### YAML - [libYAML](https://www.pyyaml.org/wiki/LibYAML) - YAML 1.1 parser and emitter. [`MIT`](https://spdx.org/licenses/MIT.html) ## Testing - [CHEAT](https://github.com/Tuplanolla/cheat) - Simple unit testing framework. [`BSD-2-Clause`](https://spdx.org/licenses/BSD-2-Clause.html) - [Check](https://libcheck.github.io/check) - Unit testing framework. [`LGPL-2.1-only`](https://spdx.org/licenses/LGPL-2.1-only.html) - [ciut](https://github.com/yhfudev/cpp-ci-unit-test.git) - A modern minimal hassle unit test framework. [`MIT`](https://spdx.org/licenses/MIT.html) - [clar](https://github.com/vmg/clar) - Clear and simple unit testing framework. [`MIT`](https://spdx.org/licenses/MIT.html) - [CMock](http://www.throwtheswitch.org/cmock) - Mock/stub generator. [`MIT`](https://spdx.org/licenses/MIT.html) - [cmocka](https://cmocka.org/) - Unit testing framework with support for mock objects. [`Apache-2.0`](https://spdx.org/licenses/Apache-2.0.html) - [Criterion](https://criterion.readthedocs.io/en/master) - KISS, non-intrusive test framework. [`MIT`](https://spdx.org/licenses/MIT.html) - [ctest](https://github.com/bvdberg/ctest) - Yet another unit testing framework. [`Apache-2.0`](https://spdx.org/licenses/Apache-2.0.html) - [CUnit](http://cunit.sourceforge.net/) - Another unit testing framework. [`LGPL-2.1-or-later`](https://spdx.org/licenses/LGPL-2.1-or-later.html) - [greatest](https://github.com/silentbicycle/greatest) - Unit testing library in one file, with no memory allocation. [`ISC`](https://spdx.org/licenses/ISC.html) - [minctest](https://github.com/codeplea/minctest) - Unit testing microlibrary. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [munit](https://nemequ.github.io/munit) - Small unit testing framework. [`MIT`](https://spdx.org/licenses/MIT.html) - [Nala](https://github.com/eerimoq/nala) - A test framework for C projects. [`MIT`](https://spdx.org/licenses/MIT.html) - [Rexo](https://github.com/christophercrouzet/rexo) - Framework for C89/C++ featuring automatic registration of tests and a polished API. [`Unlicense`](https://spdx.org/licenses/Unlicense.html) - [theft](https://github.com/silentbicycle/theft) - Property-based testing (similar to [Quickcheck](https://wiki.haskell.org/Introduction_to_QuickCheck2)). [`MIT`](https://spdx.org/licenses/MIT.html) - [Unity](http://www.throwtheswitch.org/unity) - Simple unit testing framework. [`MIT`](https://spdx.org/licenses/MIT.html) - [utest](https://github.com/evolutional/utest) - Single-header unit testing library. [`Unlicense`](https://spdx.org/licenses/Unlicense.html) ## Text Editor Extensions While practically any decent programmer’s text editor supports C, there are some extensions that make it more pleasant. These are labelled by editor. - [CCompletion](http://freeweb.siol.net/rmihor/NppCCompletionPlugin.zip) - Notepad++ autocompletion plugin. Works with all identifiers recognized by Ctags. This is a download link. [`GPL-2.0-or-later`](https://spdx.org/licenses/GPL-2.0-or-later.html) - [CEDET](http://cedet.sourceforge.net/) - Collection of Emacs Development Environment Tools; designed to provide IDE-like features to Emacs. Built-in. [`GPL-3.0-or-later`](https://spdx.org/licenses/GPL-3.0-or-later.html) - [Flycheck](https://github.com/flycheck/flycheck) - Modern syntax checking for Emacs. For C, it can use either GCC or Clang as a back-end. [`GPL-3.0-or-later`](https://spdx.org/licenses/GPL-3.0-or-later.html) - [Neomake](https://github.com/neomake/neomake) - Async :make and linting framework for Neovim/Vim. [`MIT`](https://spdx.org/licenses/MIT.html) - [Syntastic](https://github.com/vim-syntastic/syntastic) - Syntax checking and linting for Vim. [`WTFPL`](https://spdx.org/licenses/WTFPL.html) - [YASnippet](http://joaotavora.github.io/yasnippet/) - Emacs code template system, with C templates for common snippets. [`GPL-3.0-or-later`](https://spdx.org/licenses/GPL-3.0-or-later.html) - [YouCompleteMe](https://github.com/ycm-core/YouCompleteMe) - Code completion engine for Vim. [`GPL-3.0-only`](https://spdx.org/licenses/GPL-3.0-only.html) ## Tools Useful programs to help you write and debug C code which are _not_ editors, libraries or compilers. - [Artistic Style](http://astyle.sourceforge.net/) - Fast and small automatic source code formatter that supports C. [`LGPL-3.0-only`](https://spdx.org/licenses/LGPL-3.0-only.html) - [address-sanitizer](https://github.com/google/sanitizers) - Fast memory error detector. [`Apache-2.0`](https://spdx.org/licenses/Apache-2.0.html) - [c](https://github.com/ryanmjacobs/c) - Compile and execute C “scripts” in one go on the command line. Also has shebang support. [`MIT`](https://spdx.org/licenses/MIT.html) - [c99sh](https://github.com/RhysU/c99sh) - Run C files using hash-bang. [`BSD-2-Clause`](https://spdx.org/licenses/BSD-2-Clause.html) - [cdecl](https://cdecl.org/) - Online service to translate C declarations into English and vice versa. Public domain. - [cinclude2dot](https://www.flourish.org/cinclude2dot/) - Graphs include dependencies in a project using Graphviz. [GPL-1.0-or-later](https://spdx.org/licenses/GPL-1.0.html) or [`GPL-2.0-or-later`](https://spdx.org/licenses/GPL-2.0-or-later.html) or [`GPL-3.0-or-later`](https://spdx.org/licenses/GPL-3.0-or-later.html) - [ClangCheck](https://clang.llvm.org/docs/ClangCheck.html) - Static analysis tool, designed to work with Clang. [`NCSA`](https://spdx.org/licenses/NCSA.html) - [conan.io](https://conan.io/) - Something of a package manager for C. [`MIT`](https://spdx.org/licenses/MIT.html). - [Cppcheck](http://cppcheck.sourceforge.net/) - Static analysis tool. Despite the name, works well with C. [`GPL-3.0-or-later`](https://spdx.org/licenses/GPL-3.0-or-later.html) - [Glade](https://glade.gnome.org/) - RAD tool to enable quick development of GTK+ GUIs. [`GPL-2.0-only`](https://spdx.org/licenses/GPL-2.0-only.html) - [GMSL](https://gmsl.sourceforge.net/) - GNU Make Standard Library; a collection of additional functionality for GNU Make. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [GNU Global](https://www.gnu.org/software/global/) - Source code tagging tool. [`GPL-3.0-only`](https://spdx.org/licenses/GPL-3.0-only.html) - [GPP](https://logological.org/gpp) - General-purpose preprocessor. More versatile than the C preprocessor, but more flexible than m4. [`LGPL-3.0-or-later`](https://spdx.org/licenses/LGPL-3.0-or-later.html) - [Highlight](http://www.andre-simon.de/index.php) - Converts source code to formatted text with nice highlighting. [`GPL-3.0-only`](https://spdx.org/licenses/GPL-3.0-only.html) - [include-what-you-use](https://github.com/include-what-you-use/include-what-you-use) - Helps find unecessary inclusions and make suggestions for fixing them. Based on LLVM/Clang (and only works with it). [`NCSA`](https://spdx.org/licenses/NCSA.html) - [indent](https://www.gnu.org/software/indent/) - Formats C source code automatically to make it easier to read. Also converts from one style of source to another. [`GPL-3.0-or-later`](https://spdx.org/licenses/GPL-3.0-or-later.html) - [SMACK](https://github.com/smackers/smack) - Modular software verification toolchain and a self-contained software verifier. Currently only works with programs compiled using Clang. [`MIT`](https://spdx.org/licenses/MIT.html) - [unifdef](http://dotat.at/prog/unifdef/) - Removes #ifdef and #if directives with their delimited text without touching any other part of the file. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) or [`BSD-2-Clause`](https://spdx.org/licenses/BSD-2-Clause.html) ## Utilities A ‘catch-all’ category for anything that doesn’t fit well anywhere else. - [ApeTagLibs](https://github.com/jeremyevans/ape_tag_libs/tree/master/c) - Library for working with APEv2 tags. [`MIT`](https://spdx.org/licenses/MIT.html) - [argparse](https://github.com/cofyc/argparse) - Command-line argument parsing library, inspired by Python’s argparse module. [`MIT`](https://spdx.org/licenses/MIT.html) - [attr](http://savannah.nongnu.org/projects/attr/) - Commands for manipulating filesystem extended attributes. [`GPL-2.0-or-later`](https://spdx.org/licenses/GPL-2.0-or-later.html) - [bfd](http://sourceware.org/binutils/docs/bfd/) - Library for manipulating binary object files. Part of GNU binutils. [`GPL-3.0-or-later`](https://spdx.org/licenses/GPL-3.0-or-later.html) - [Caffeine](https://github.com/dmw/caffeine) - Library for building daemons and services for Linux and FreeBSD systems. [`LGPL-2.1-or-later`](https://spdx.org/licenses/LGPL-2.1-or-later.html) - [CException](http://www.throwtheswitch.org/cexception) - Implementation of exceptions. [`MIT`](https://spdx.org/licenses/MIT.html) - [CommonMark](https://github.com/commonmark/commonmark-spec) - Implementation of the CommonMark spec. [Variety of licenses, all open source](https://github.com/commonmark/commonmark-spec/blob/master/LICENSE). - [cpu\_features](https://github.com/google/cpu_features) - Get CPU features at runtime. [`Apache-2.0`](https://spdx.org/licenses/Apache-2.0.html). - [CRIU](https://criu.org/Main_Page) - Checkpoint/Restore In Userspace; a software tool (with a C API) for ‘freezing’ a running application to disk, then restoring it. [`GPL-2.0-only`](https://spdx.org/licenses/GPL-2.0-only.html) or [`LGPL-2.1-only`](https://spdx.org/licenses/LGPL-2.1-only.html) - [D-Bus](https://www.freedesktop.org/wiki/Software/dbus/) - Simple way for applications to talk to one another. [`AFL-2.1`](https://spdx.org/licenses/AFL-2.1.html) or [`GPL-2.0-or-later`](https://spdx.org/licenses/GPL-2.0-or-later.html) - [Discount](http://www.pell.portland.or.us/~orc/Code/discount/) - Simple implementation of a Markdown parser. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [dlx](https://github.com/blynn/dlx) - Implementation of [Knuth’s Algorithm X](https://en.wikipedia.org/wiki/Knuth's_Algorithm_X), with example solvers. [`GPL-3.0-or-later`](https://spdx.org/licenses/GPL-3.0-or-later.html) - [docopt.c](https://github.com/docopt/docopt.c) - Implementation of a command-line option parser. [`MIT`](https://spdx.org/licenses/MIT.html) - [dyncall](http://www.dyncall.org/) - Another foreign function interface library. [`MIT`](https://spdx.org/licenses/MIT.html) - [GNU FreeIPMI](https://gnu.org/software/freeipmi/index.html) - In-band and out-of-band IPMI implementation. [`GPL-3.0-only`](https://spdx.org/licenses/GPL-3.0-only.html) - [GNU gperf](https://www.gnu.org/software/gperf/) - Perfect hash function generator, given a list of strings. Outputs C code. [`GPL-3.0-or-later`](https://spdx.org/licenses/GPL-3.0-or-later.html) - [GNU Libffcall](https://gnu.org/software/libffcall/) - Collection of libraries for building foreign function interfaces. [`GPL-3.0-or-later`](https://spdx.org/licenses/GPL-3.0-or-later.html) - [Hoedown](https://github.com/hoedown/hoedown) - Fully standards-compliant, extension-supporting, UTF-8 aware, fast Markdown parser. [`MIT`](https://spdx.org/licenses/MIT.html) - [Kitsune](http://kitsune-dsu.com/) - Efficient, general-purpose framework for dynamic software updating. [`LGPL-3.0-or-later`](https://spdx.org/licenses/LGPL-3.0-or-later.html) - [libCello](http://libcello.org/) - Library introducing higher-level programming to C. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [libcmark](https://github.com/jgm/cmark) - Library for parsing the CommonMark dialect of Markdown. [`BSD-2-Clause`](https://spdx.org/licenses/BSD-2-Clause.html) - [libcoap](https://github.com/obgm/libcoap) - Implementation of the [Constrained Application Protocol](http://coap.technology/). [`GPL-2.0-or-later`](https://spdx.org/licenses/GPL-2.0-or-later.html) or [`BSD-2-Clause`](https://spdx.org/licenses/BSD-2-Clause.html) - [libcox](http://libcox.symisc.net/) - Library which permits cross-platform system calls and standard utilities across different operating systems. [`BSD-2-Clause`](https://spdx.org/licenses/BSD-2-Clause.html) - [libffi](https://github.com/atgreen/libffi) - Portable foreign-function interface library. [`MIT`](https://spdx.org/licenses/MIT.html) - [libgeohash](https://github.com/simplegeo/libgeohash) - Pure C implementation of the Geohash algorithm. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [libgit2](https://libgit2.org/) - Portable implementation of the Git core methods, provided as a re-entrant linkable library. [Custom license](https://github.com/libgit2/libgit2/blob/master/COPYING). - [libgss](https://gnu.org/software/gss/) - Generic Security Service. [`GPL-3.0-or-later`](https://spdx.org/licenses/GPL-3.0-or-later.html) - [libimobiledevice](https://github.com/libimobiledevice/libimobiledevice) - Cross-platform protocol library to communicate with iThings. [`LGPL-2.1-or-later`](https://spdx.org/licenses/LGPL-2.1-or-later.html) - [libnfc](https://github.com/nfc-tools/libnfc) - Platform-independent Near-Field Communication library. [`LGPL-3.0-only`](https://spdx.org/licenses/LGPL-3.0-only.html) - [libpostal](https://github.com/openvenues/libpostal) - Library for parsing and normalization of street addresses around the world. Powered by statistical NLP and open geo data. [`MIT`](https://spdx.org/licenses/MIT.html) - [libtrading](http://libtrading.org/) - Implementation of network protocols for communicating with exchanges, dark pools and other trading venues. Supports FIX, FIX/FAST and many proprietary protocols. [`BSD-2-Clause`](https://spdx.org/licenses/BSD-2-Clause.html) - [libusb](https://libusb.info/) - Provides generic access to USB devices. [`LGPL-2.1-or-later`](https://spdx.org/licenses/LGPL-2.1-or-later.html) - [libuv](http://libuv.org/) - Cross-platform asynchronous I/O. [`MIT`](https://spdx.org/licenses/MIT.html) - [libvldmail](https://github.com/dertuxmalwieder/libvldmail) - Your friendly email validation library. No external dependencies (not even regexps). [`WTFPL`](https://spdx.org/licenses/WTFPL.html) - [linenoise](https://github.com/antirez/linenoise) - Small, self-contained alternative to readline and libedit. [`BSD-2-Clause`](https://spdx.org/licenses/BSD-2-Clause.html) - [MegaMimes](https://trumpowen.github.io/MegaMimes) - Library for getting the [MIME](https://en.wikipedia.org/wiki/MIME) types of a file. [`MIT`](https://spdx.org/licenses/MIT.html) - [ncurses](https://gnu.org/software/ncurses/) - Coloured terminal UI library. [`MIT`](https://spdx.org/licenses/MIT.html) - [netbsd-curses](https://github.com/sabotage-linux/netbsd-curses) - Simplified and small version of ncurses, with the same interface. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [nope.c](https://github.com/riolet/WAFer) - Ultra-light software platform for scalable server-side and networking applications (think node.js for C programmers). [`GPL-2.0-only`](https://spdx.org/licenses/GPL-2.0-only.html) - [parg](https://github.com/jibsen/parg) - A single-file reimplementation of `getopt` with better defaults. [`CC0-1.0`](https://spdx.org/licenses/CC0-1.0.html) - [pbc](https://github.com/cloudwu/pbc) - Protocol buffers library. [`MIT`](https://spdx.org/licenses/MIT.html) - [progressbar](https://github.com/doches/progressbar) - Easy-to-use library for displaying text progress bars. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [rabbitmq-c](https://github.com/alanxz/rabbitmq-c) - Client library for [RabbitMQ](http://www.rabbitmq.com/). [`MIT`](https://spdx.org/licenses/MIT.html) - [Ragel](http://www.colm.net/open-source/ragel/) - DSL for state machines that compiles to C. [`GPL-2.0-only`](https://spdx.org/licenses/GPL-2.0-only.html) - [Rogueutil](https://github.com/sakhmatd/rogueutil) - Cross-platform library for creating text-based user interfaces (TUI) [`Apache-2.0`](https://spdx.org/licenses/Apache-2.0.html) - [sort](https://github.com/swenson/sort) - Collection of sorting routines, which type-specialize at compile-time with a user-defined type. [`MIT`](https://spdx.org/licenses/MIT.html) - [termbox](https://github.com/nsf/termbox) - Library for writing text-based interfaces. [`MIT`](https://spdx.org/licenses/MIT.html) - [tinyexpr](https://github.com/codeplea/tinyexpr) - Tiny recursive-descent parser, compiler and evaluation engine for simple mathematical expressions. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [tm](https://github.com/recp/tm) - ⏱ Timer and Timeline Utils for C. [`MIT`](https://spdx.org/licenses/MIT.html) - [Tulip Indicators](https://tulipindicators.org/) - Library of functions for technical analysis of financial data. [`LGPL-3.0-or-later`](https://spdx.org/licenses/LGPL-3.0-or-later.html) - [whereami](https://github.com/gpakosz/whereami) - One-file library for locating the current executable on the file system. [`WTFPL`](https://spdx.org/licenses/WTFPL.html) - [XLSX I/O](https://brechtsanders.github.io/xlsxio/) - Cross-platform library for reading and writing .xlsx files. [`MIT`](https://spdx.org/licenses/MIT.html) - [zlog](http://hardysimpson.github.io/zlog/) - Reliable, pure C logging library. [`LGPL-2.1-only`](https://spdx.org/licenses/LGPL-2.1-only.html) - [zproto](https://github.com/zeromq/zproto) - Protocol framework for ZeroMQ. [`MIT`](https://spdx.org/licenses/MIT.html) ## Web Frameworks Comprehensive and integrated solutions for building the next brilliant web application in C. - [facil.io](http://facil.io/) - Mini-framework for web applications. Includes a fast HTTP and Websocket server, and also supports custom protocols. [`MIT`](https://spdx.org/licenses/MIT.html) - [kcgi](https://kristaps.bsd.lv/kcgi) - CGI and FastCGI library for C [`ISC`](https://spdx.org/licenses/ISC.html). - [KLone](http://www.koanlogic.com/klone/) - Fully featured, multi-platform, web application development framework, targeted especially at embedded systems and appliances. [`BSD-3-Clause`](https://spdx.org/licenses/BSD-3-Clause.html) - [Kore](https://kore.io/) - Easy-to-use web application framework for writing scalable web APIs in C. [`ISC`](https://spdx.org/licenses/ISC.html) ## Windows Environments Technologies designed to bring Windows into the 21st century with respect to support for C. - [Cygwin](https://cygwin.com/) - Designed to emulate a POSIX-compatible environment extensively under Windows. [Various licenses, all open source](https://cygwin.com/licensing.html). - [MinGW-w64](http://mingw-w64.yaxm.org/doku.php/start) - Minimalist environment for C development on Windows with 64 bit support. [Various licenses, all open source](http://mingw.org/license). - [MSYS2](http://msys2.github.io/) - Minimal SYStem 2; aims to provide support for a POSIX environment on Windows, with a package manager based on Arch Linux’s pacman. Packages have individual licenses, otherwise, as MinGW and Cygwin. `Source: GitHub & notabug` ## ENJOY & HAPPY LEARNING! ❤ ---
**Author:** ![Aina](https://onehack.st/user_avatar/onehack.st/aina/32/167469_2.png) [@Aina](https://onehack.st/u/Aina)\ **Post date:** [February 9, 2021, 11:33am UTC](https://onehack.st/t/awesome-c-massive-resources-collection/172246/2 "2021-02-09T11:33:20Z")
---
**Author:** ![surya77](https://onehack.st/letter_avatar_proxy/v4/letter/s/c0e974/32.png) [@surya77](https://onehack.st/u/surya77)\ **Post date:** [February 10, 2021, 2:20am UTC](https://onehack.st/t/awesome-c-massive-resources-collection/172246/3 "2021-02-10T02:20:05Z")
Thank you very much 🙏 👍