Ecosyste.ms: Awesome

An open API service indexing awesome lists of open source software.

awesome-c

Continuing the development of awesome-c list on GitHub
https://github.com/inputsh/awesome-c

  • aimake - Build tool designed to avoid complex configurations. [`GNU GPL3 or later`](http://www.gnu.org/licenses/gpl-3.0.html)
  • Autoconf - Extensible package of M4 macros that produce shell scripts to automatically configure software source code packages. Part of the Autotools. [`GNU GPL3 or later`](http://www.gnu.org/licenses/gpl-3.0.html)
  • Automake - Tool for automatically generating `Makefile.in` files compliant with the GNU Coding Standards. Requires the use of Autoconf. Part of the Autotools. [`GNU GPL3 or later`](http://www.gnu.org/licenses/gpl-3.0.html)
  • CMake - Tools for cross-platform building, testing, and packaging. [`3-clause BSD`](https://gitlab.kitware.com/cmake/cmake/raw/master/Copyright.txt)
  • Jam - Build system, designed to be easier than make. Understands C build rules implicitly. [`Jam License`](https://en.wikipedia.org/wiki/Perforce_Jam#License)
  • Libtool - Generic library support script. Part of the Autotools. [`GNU GPL3 or later`](http://www.gnu.org/licenses/gpl-3.0.html)
  • Meson - Extremely fast, user-friendly build system. Based on Ninja. [`Apache 2.0`](https://directory.fsf.org/wiki/License:Apache-2.0)
  • Premake - Build script generator for toolsets like Visual Studio, Xcode, or GNU Make. [`3-clause BSD`](https://directory.fsf.org/wiki/License:BSD-3-Clause)
  • SCons - An easier, more reliable and faster way to build software. [`MIT`](https://raw.githubusercontent.com/atom/atom/master/LICENSE.md)
  • Ninja - Small, simple build system with a focus on speed. [`Apache 2.0`](https://directory.fsf.org/wiki/License:Apache-2.0)
  • Bazel - Build system for various operating systems and targets. [`Apache 2.0`](https://directory.fsf.org/wiki/License:Apache-2.0)
  • Buck - Build system created and used by Facebook. [`Apache 2.0`](https://directory.fsf.org/wiki/License:Apache-2.0)
  • Qbs - Modern build tool for software projects. [`LGPL3`](https://code.qt.io/cgit/qbs/qbs.git/tree/LICENSE.LGPLv3)
  • qmake - Build system included with the Qt Framework. [`GNU GPL3 with Qt Exception`](https://github.com/qt/qtbase/blob/5.11/LICENSE.GPL3-EXCEPT)
  • xmake - Cross-platform build utility based on lua. [`Apache 2.0`](https://github.com/xmake-io/xmake/blob/master/LICENSE.md )
  • Clang - C compiler for LLVM. Supports C11. [`NCSA`](https://directory.fsf.org/wiki/License:NCSA)
  • CompCert - Fully-verified C compiler. Supports almost all of C89. [`GNU GPL2.1 or later`](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
  • GCC - Provides a C compiler as part of its compiler set. Supports C11 and OpenMP. [`GNU GPL3 or later`](http://www.gnu.org/licenses/gpl-3.0.html)
  • PCC - Venerable C compiler. Supports C99. [`Various free licenses`](http://pcc.ludd.ltu.se/licenses/)
  • TCC - Tiny C Compiler; a small, fast C compiler. Supports C99 (except complex types). [`GNU LGPL2.1`](http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html)
  • Intel SPMD - Compiler for a variant of the C language, for single program, multiple data programming. [`Various licenses`](https://github.com/ispc/ispc/blob/master/LICENSE.txt)
  • ccache - Compiler cache designed to speedup recompilation. [`GNU GPL3 or later`](https://ccache.dev/license.html)
  • yasm - Yasm Modular Assembler Project. [`2-clause BSD`](https://directory.fsf.org/wiki/License:BSD-2-Clause)
  • libzip - A C library for reading, creating, and modifying zip archives. [`3-clause BSD`](https://directory.fsf.org/wiki/License:BSD-3-Clause)
  • lzo - Very fast data compression library. [`GNU GPL2.1`](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
  • zlib - Massively-spiffy yet delicately-unobtrusive compression library. [`3-clause BSD`](https://directory.fsf.org/wiki/License:BSD-3-Clause)
  • bzip2 - Patent free, high quality data compressor. [`3-clause BSD`](https://directory.fsf.org/wiki/License:BSD-3-Clause)
  • lz4 - Fast Compression algorithm.
  • snappy - Fast compression library (implementation in C++, native bindings to C).
  • zstd - Fast real-time compression algorithm [`3-clause BSD`](https://directory.fsf.org/wiki/License:BSD-3-Clause)
  • brotli - Generic lossless compression algorithm based on LZ77, Huffman coding and 2nd order context modelling [`MIT`](https://raw.githubusercontent.com/atom/atom/master/LICENSE.md)
  • quicklz - Fast compression library. [`GNU GPL2.1`](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
  • pixz - Pixz (pronounced pixie) is a parallel, indexing version of `xz`. [`2-clause BSD`](https://directory.fsf.org/wiki/License:BSD-2-Clause)
  • GnuTLS - Secure communication library, implementing SSL, TLS and DTLS. [`GNU LGPL2.1 or later`](http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html)
  • libgcrypt - General-purpose cryptography library, with a range of available ciphers. [`GNU LGPL2.1or later (code)`](http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html) and [`GNU GPL2.1 or later (manual and tools)`](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
  • OpenSSL - Implementation of the SSL and TLS protocols, and also includes a cryptography library. [`Dual Licensed under the OpenSSL License and the SSLeay License`](https://www.openssl.org/source/license.html)
  • libsodium - Modern and easy-to-use crypto library. [`Expat`](https://directory.fsf.org/wiki/License:Expat)
  • libtomcrypt - Fairly comprehensive, modular and portable cryptographic toolkit. [`Public Domain`](https://creativecommons.org/share-your-work/public-domain/)
  • mbed TLS - Another crypto implementation for C. [`Apache 2.0`](https://directory.fsf.org/wiki/License:Apache-2.0)
  • libressl - Modernized fork of OpenSSL. [`Various Licenses`](https://cvsweb.openbsd.org/cgi-bin/cvsweb/~checkout~/src/lib/libssl/LICENSE?rev=1.12)
  • BerkeleyDB - Library for a high-performance embedded database for key-value data. [`GNU AGPLv3`](https://www.gnu.org/licenses/agpl-3.0.html)
  • Hiredis - Minimalistic client library for Redis. [`3-clause BSD`](https://directory.fsf.org/wiki/License:BSD-3-Clause)
  • LMDB - Ultra-fast, ultra-compact key-value embedded data store. [`OpenLDAP License`](https://directory.fsf.org/wiki/License:OLDAP-2.7)
  • MariaDB - Robust, scalable and reliable SQL server, designed to be a drop-in replacement for MySQL. [`3-clause BSD`](https://directory.fsf.org/wiki/License:BSD-3-Clause)
  • mongo-c-driver - High-performance client library for [MongoDB](https://www.mongodb.com/). [`Apache 2.0`](https://directory.fsf.org/wiki/License:Apache-2.0)
  • PostgreSQL - Powerful object-relational database system. [`PostgreSQL licence`](https://opensource.org/licenses/postgresql)
  • recutils - Set of tools and a C library for accessing human-editable, plaintext database files called recfiles. [`GNU GPL3 or later`](http://www.gnu.org/licenses/gpl-3.0.html)
  • Redis - Advanced key-value store. [`3-clause BSD`](https://directory.fsf.org/wiki/License:BSD-3-Clause)
  • sophia - Modern, embeddable key-value database. [`FreeBSD`](https://directory.fsf.org/wiki?title=License:FreeBSD)
  • SQLite - Self-contained, serverless, zero-configuration, transactional SQL database engine with a C interface. [`Public Domain`](https://creativecommons.org/share-your-work/public-domain/)
  • UnQLite - Self-contained, serverless, zero-configuration, transactional NoSQL engine with a C interface. [`FreeBSD`](https://directory.fsf.org/wiki?title=License:FreeBSD)
  • Darknet - Open source neural network framework written in C and CUDA. It is fast, easy to install, and supports CPU and GPU computation.
  • Cxref - Generates documentation of C programs in either LaTeX, HTML, RTF or SGML. [`GNU GPL2.1`](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
  • DocOnce - Modestly-tagged markup language that can be used to generate a range of formats. [`3-clause BSD`](https://directory.fsf.org/wiki/License:BSD-3-Clause)
  • Doxygen - The de-facto standard tool for generating C documentation from annotated sources. Can generate a large range of formats. [`GNU GPL2.1`](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
  • GTK-Doc - Tool for generating C documentation from annotated sources. Has support for the Autotools. [`GNU GPL2.1 (code)`](http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html) or [`GNU FDL1.1`](https://www.gnu.org/licenses/old-licenses/fdl-1.1.html)
  • Anjuta DevStudio - The GNOME IDE. [`GNU GPL2.1`](http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html)
  • Atom - Hackable text editor for the 21st century. [`MIT`](https://raw.githubusercontent.com/atom/atom/master/LICENSE.md)
  • Code::Blocks - Extensible, configurable IDE supporting C. [`GNU GPL3`](http://www.gnu.org/licenses/gpl-3.0.html)
  • CodeLite - Cross-platform IDE. [`GNU GPL2.1`](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
  • Eclipse - IDE written in Java. [`EPL`](https://directory.fsf.org/wiki/License:EPL-1.0)
  • Geany - Very small and fast IDE. [`GNU GPL2.1 or later`](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
  • KDevelop - The KDE IDE. [`GNU GPL2.1`](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
  • Qt Creator - Cross-platform IDE written with C++ and Qt, part of the Qt SDK. Supports Clang Code Model. [`GNU GPL3 with Qt exception`](https://github.com/qt-creator/qt-creator/blob/master/LICENSE.GPL3-EXCEPT)
  • Visual Studio Code - Code editing, redefined. Visual Studio Code.
  • Amazon FreeRTOS - RTOS for microcontrollers that makes small, low-power edge devices easy to program. [`MIT`](https://github.com/aws/amazon-freertos/blob/master/LICENSE)
  • ChibiOS - RTOS with complete development environment (HAL, drivers, support files, and tools). [`Various Licenses`](http://www.chibios.org/dokuwiki/doku.php?id=chibios:licensing:start)
  • Contiki - Connect low-cost, low power microcontrollers to the Internet. [`3-clause BSD`](https://github.com/contiki-os/contiki/blob/master/LICENSE)
  • Zephyr Project - Scalable real-time RTOS supporting multiple hardware architectures, optimized for resource constrained devices. [`Apache 2.0`](https://directory.fsf.org/wiki/License:Apache-2.0)
  • RIOT OS - Real-time multi-threading operating system that supports a range of devices that are typically found in the Internet of Things. [`LGPL-2.1`](https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html)
  • Cygwin - Designed to emulate a POSIX-compatible environment extensively under Windows. [`Various Licenses`](https://cygwin.com/licensing.html)
  • MinGW-w64 - Minimalist environment for C development on Windows with 64 bit support. [`Various Licenses`](http://mingw.org/license)
  • APR - Apache Portable Runtime; another library of cross-platform utility functions. [`Apache 2.0`](https://directory.fsf.org/wiki/License:Apache-2.0)
  • C Algorithms - Collection of common algorithms and data structures for C. [`ISC`](https://directory.fsf.org/wiki/License:ISC)
  • C Macro Collections - Header only, macro generated, generic and type-safe Collections in C. [`MIT`](https://spdx.org/licenses/MIT.html)
  • CPL - The Common Pipeline Library; a set of libraries designed to be a comprehensive, efficient and robust software toolkit. [`GNU GPL2.1`](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
  • EFL - Large collection of useful data structures and functions.
  • GLib - Library of utility functions and structures, designed to be portable, efficient and powerful. [`GNU LGPL2.1`](http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html)
  • GIO - Modern and easy-to-use VFS API. [`GNU LGPL2.1`](http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html)
  • GObject - Object-oriented system and object model for C. [`GNU LGPL2.1`](http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html)
  • libnih - Lightweight library of C functions and structures. [`GNU GPL2.1`](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
  • libU - Small library of basic utilities, including memory allocation, string manipulation and logging. [`3-clause BSD`](https://directory.fsf.org/wiki/License:BSD-3-Clause)
  • PBL - Large library of utilities, featuring data structures, among other things. [`GNU LGPL2.1 or later (library)`](http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html) or [`GNU GPL2.1 or later (test code)`](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
  • qlibc - Simple and powerful C library, designed as a replacement for GLib while focusing on being small and light. [`qLib license`](https://github.com/wolkykim/qlibc/blob/master/LICENSE) (similar to [`FreeBSD`](https://directory.fsf.org/wiki?title=License:FreeBSD))
  • stb - Range of single-file libraries for C. [`Public Domain`](https://creativecommons.org/share-your-work/public-domain/)
  • libsrt - Safe Real-Time library for C. [`3-clause BSD`](https://directory.fsf.org/wiki/License:BSD-3-Clause)
  • Corange - Game engine in pure C. [`FreeBSD`](https://directory.fsf.org/wiki?title=License:FreeBSD)
  • Darkplaces - Modified version of the Quake2 engine. [`GNU GPL2.1`](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
  • ioquake3 - The Quake3 engine, freed at last. [`GNU GPL2.1`](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
  • Orx - Portable, lightweight, plugin-based, data-driven, 2D-oriented game engine. [`zlib`](https://directory.fsf.org/wiki/License:Zlib)
  • Quake - The Quake engine. [`GNU GPL2.1`](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
  • Quake2 - The Quake2 engine. [`GNU GPL2.1`](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
  • Spearmint - Engine designed for FPS games. [`GNU GPL3 or later`](http://www.gnu.org/licenses/gpl-3.0.html)
  • Allegro - Cross-platform, video game development and multimedia library. [`zlib`](https://directory.fsf.org/wiki/License:Zlib)
  • Chipmunk2D - Fast and lightweight 2D game physics library. [`Expat`](https://directory.fsf.org/wiki/License:Expat)
  • CSFML - Binding for [SFML](https://www.sfml-dev.org/index.php) in C. [`zlib`](https://directory.fsf.org/wiki/License:Zlib)
  • FreeGLUT - Alternative to the OpenGL Utility Toolkit. Allows the creation and management of windows with OpenGL contexts. [`X11`](https://directory.fsf.org/wiki/License:X11)
  • GLFW - Multi-platform library for creating windows with OpenGL contexts. [`zlib`](https://directory.fsf.org/wiki/License:Zlib)
  • libao - Cross-platform audio library with a wide variety of outputs. [`GNU GPL2.1 or later`](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
  • RetroArch - The reference frontend for [libretro](https://www.libretro.com/). [`GNU GPL3`](http://www.gnu.org/licenses/gpl-3.0.html)
  • SDL and SDL2 - Cross-platform development library designed to provide low-level access to audio, keyboard, mouse, joystick and graphics hardware via OpenGL. SDL2 is the most current version. [`zlib`](https://directory.fsf.org/wiki/License:Zlib)
  • raylib - Simple and easy-to-use library to learn videogames programming. [`zlib`](https://directory.fsf.org/wiki/License:Zlib)
  • klib - Small and lightweight implementations of common algorithms and data structures. [`MIT`](https://en.wikipedia.org/wiki/MIT_License)
  • Cairo - 2D graphics library. [`GNU LGPL2.1`](http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html) or [`MPLv1.1`](https://directory.fsf.org/wiki/License:MPL-1.1)
  • Cogl - GPU graphics and utilities API. [`Expat`](https://directory.fsf.org/wiki/License:Expat)
  • Clutter - UI library based on OpenGL. [`GNU LGPL2.1`](http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html)
  • giflib - Library for reading and writing gif images. [`MIT`](https://spdx.org/licenses/MIT.html)
  • heman - Tiny library of image utilities dealing with height maps, normal maps, distance fields and the like. [`Expat`](https://directory.fsf.org/wiki/License:Expat)
  • libcaca - ASCII renderer for terminal-based interfaces. [`WTFPLv2`](http://www.wtfpl.net/txt/copying/)
  • libimagequant - Small, portable library for high-quality conversion of RGBA images to 8-bit indexed colour images. [`FreeBSD`](https://directory.fsf.org/wiki?title=License:FreeBSD)
  • libjpeg-turbo - Faster library for reading and writing JPEG files. [`Various Licenses`](https://libjpeg-turbo.org/About/License)
  • libpng - The official PNG reference library. [`libpng license`](http://www.libpng.org/pub/png/src/libpng-LICENSE.txt)
  • libxmi - Function library for rasterizing 2D vector graphics. [`GNU GPL3 or later`](http://www.gnu.org/licenses/gpl-3.0.html)
  • mozjpeg - Improved JPEG encoder. [`3-clause BSD`](https://directory.fsf.org/wiki/License:BSD-3-Clause)
  • OpenGL - Industry adopted 2D and 3D graphics API. More resources at [awesome-opengl](https://github.com/eug/awesome-opengl).
  • OpenGL ES - Industry adopted 2D and 3D graphics API for mobile and embedded devices.
  • OpenGL SC - Graphic and compute standard for industry requiring system safety certification.
  • Vulkan - Explicit graphic and compute API for modern cross-platform development. More resources at [awesome-vulkan](https://github.com/vinjn/awesome-vulkan).
  • widget toolkits
  • GTK+ - Cross-platform widget toolkit. [`GNU LGPL2.1`](http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html)
  • IUP - Another cross-platform widget toolkit. [`Expat`](https://directory.fsf.org/wiki/License:Expat)
  • Tk - Basic widget toolkit. Part of Tcl/Tk. [`Tcl/Tk License`](http://www.tcl.tk/software/tcltk/license.html)
  • XForms Toolkit - Widget toolkit designed for the XWindow system. [`GNU LGPL2.1`](http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html)
  • nuklear - Single-header ANSI C gui library. [`Public Domain`](https://creativecommons.org/share-your-work/public-domain/)
  • libui - Simple and portable (but not inflexible) GUI library. [`MIT`](https://github.com/andlabs/libui/blob/master/LICENSE)
  • LCUI - Small C library for building user interfaces with C, XML and CSS. [`MIT`](https://github.com/lc-soft/LCUI/blob/develop/LICENSE.TXT)
  • jwHash - Fast hashtable implementation. [`Apache 2.0`](https://directory.fsf.org/wiki/License:Apache-2.0)
  • xxHash - Extremely fast non-cryptographic hash algorithm. [`2-clause BSD`](https://directory.fsf.org/wiki/License:BSD-2-Clause)
  • libcrc - Multi platform CRC library. [`MIT`](https://raw.githubusercontent.com/atom/atom/master/LICENSE.md)
  • murmur - C implementation of MurMur Hashing. [`Public Domain`](https://creativecommons.org/share-your-work/public-domain/)
  • t1ha - Fast Positive Hash library. [`zlib`](https://directory.fsf.org/wiki/License:Zlib)
  • libccv - Modern Computer Vision Library. [`3-clause BSD`](https://directory.fsf.org/wiki/License:BSD-3-Clause)
  • Jansson - C library for encoding, decoding and manipulating JSON. [`Expat`](https://directory.fsf.org/wiki/License:Expat)
  • jsmn - Minimalistic JSON parser. [`Expat`](https://directory.fsf.org/wiki/License:Expat)
  • json-c - Library for working with JSON. [`Expat`](https://directory.fsf.org/wiki/License:Expat)
  • parson - Lightweight JSON library written in C. [`MIT`](https://raw.githubusercontent.com/atom/atom/master/LICENSE.md)
  • WJElement - Advanced JSON manipulation library, with support for JSON Schema. [`LGPL, any version`](https://github.com/netmail-open/wjelement/)
  • YAJL - Fast C JSON streaming parser library. [`ISC`](https://directory.fsf.org/wiki/License:ISC)
  • SEI CERT C Coding Standard
  • C FAQ - comp.lang.c Frequently Asked Questions
  • Comparison of C/POSIX standard library implementations for GNU/Linux
  • GNU C Reference Manual
  • Robert Pike's notes on programming in C
  • Draft ANSI C Rationale
  • Draft C99 Rationale
  • Draft ANSI C (C89) standard
  • Draft C99 standard
  • Draft C11 standard
  • Tutorial on pointers
  • Building C Projects
  • C Programming Wikibook
  • Introduction to 'fun' C
  • Learning C with GDB
  • POSIX Threads Programming tutorial
  • The GNU C Programming Tutorial
  • Templating in C
  • 8 gdb tricks you should know
  • 10 C99 tricks
  • Diving into concurrency: trying out mutexes and atomics
  • Introduction to OpenMP
  • OpenMP tutorial
  • memcpy vs memmove
  • MPI tutorial
  • Some unknown features or tricks in C language
  • The lost art of C structure packing
  • What a C programmer should know about memory
  • What every C programmer should know about undefined behaviour
  • Advanced metaprogramming in C
  • Quick tutorial on implementing and debugging malloc, free, calloc, and realloc
  • Bit twiddling hacks
  • I do not know C
  • Implementing smart pointers for the C programming language
  • Inline functions in C
  • Metaprogramming custom control structures in C
  • Some dark corners of C
  • Writing efficient C and C code optimization
  • What every programmer should know about memory
  • C Programming Language Certified Associate preparation course
  • C: A Reference Manual 5E - Full reference book for C99.
  • C Pocket Reference - Concise reference book for C99.
  • The C Programming Language 2E - The original book on C, by its creators.
  • C Primer Plus 6E - Complete tutorial on programming in C11.
  • C Programming: A Modern Approach - Excellent book to learn the basics of C.
  • Head First C - 'Head-first' style book for learning C.
  • 21st Century C - Very good *second* programming book on C.
  • Understanding and Using C Pointers - In-depth resource on pointers in C.
  • ZeroMQ - Book for using ZeroMQ with C.
  • Expert C Programming: Deep C Secrets - Interesting, in-depth and *entertaining* look at the innards of C.
  • P99 - Suite of macros to implement advanced features like default function arguments, scope-bound resources, etc. (Requires C99) [`Q Public License`](https://tldrlegal.com/license/q-public-license-1.0-(qpl-1.0)#summary)
  • jemalloc - General purpose malloc(3) implementation that emphasizes fragmentation avoidance and scalable concurrency support, commonly used in production systems. [`FreeBSD`](https://directory.fsf.org/wiki?title=License:FreeBSD)
  • dlmalloc - Doug Lea's malloc(3) implementation, useful for academic and research purposes. [`Public Domain`](https://creativecommons.org/share-your-work/public-domain/)
  • Hoard - A Fast, Scalable, and Memory-efficient Malloc for Linux, Windows, Mac, and Solaris. [`GNU GPL2`](http://www.gnu.org/licenses/gpl-3.0.html)
  • nedmalloc - An EXTREMELY FAST portable thread caching malloc(3) implementation written in C. [`GNU GPL2`](http://www.gnu.org/licenses/gpl-3.0.html)
  • rpmalloc - Cross platform, lock-free memory allocator. [`Public Domain`](https://creativecommons.org/share-your-work/public-domain/)
  • FFMPEG - Complete, cross-platform solution to record, convert and stream audio and video. [`GNU LGPL2.1 or later`](http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html) or [`GNU GPL2.1 or later (some parts)`](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
  • GStreamer - Framework for audio and visual media. [`GNU LGPL2.1`](http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html)
  • lodepng - Simple PNG image decoder and encoder, requiring no other dependencies. [`3-clause BSD`](https://directory.fsf.org/wiki/License:BSD-3-Clause)
  • libsoup - GNOME HTTP client/server library. Uses GObject. [`GNU LGPL2.1`](http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html)
  • libmpv - Music-playing library. Compile with ``./waf configure --disable-cplayer --enable-libmpv-shared`` to not have the music player. [`GNU GPL2.1 or later`](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
  • libsoundio - Library for cross-platform, real-time audio input and output. Has a range of back-ends. [`Expat`](https://directory.fsf.org/wiki/License:Expat)
  • asnlc - Compiler of ASN.1 specifications into C source code. [`FreeBSD`](https://directory.fsf.org/wiki?title=License:FreeBSD)
  • czmq - High-level binding for ZeroMQ. [`MPL2.0`](https://www.gnu.org/licenses/license-list.html#MPL-2.0)
  • GNU adns - Advanced, easy-to-use, asynch-capable DNS client library and utilities. [`GNU GPL3 or later`](http://www.gnu.org/licenses/gpl-3.0.html)
  • GNU SASL - Implementation of the Simple Authentication and Security Layer and a few common SASL mechanism. [`GNU GPL3 or later`](http://www.gnu.org/licenses/gpl-3.0.html)
  • GnuTLS - Secure communication library, implementing SSL, TLS and DTLS. [`GNU LGPL2.1 or later`](http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html)
  • gumbo-parser - HTML5 parsing library in C99. [`Apache 2.0`](https://directory.fsf.org/wiki/License:Apache-2.0)
  • http-parser - HTTP request/response parser. [`Expat`](https://directory.fsf.org/wiki/License:Expat)
  • ldns - Library to simplify DNS programming. [`3-clause BSD`](https://directory.fsf.org/wiki/License:BSD-3-Clause)
  • libcurl - Client-side URL transfer library, supporting a wide range of formats. [`curl license`](https://curl.haxx.se/docs/copyright.html)
  • LibEtPan - Mail library providing an efficient network for IMAP, SMTP, POP and NNTP. [`3-clause BSD`](https://directory.fsf.org/wiki/License:BSD-3-Clause)
  • libev - Yet another event loop. [`FreeBSD`](https://directory.fsf.org/wiki?title=License:FreeBSD)
  • libuv - Cross-platform asynchronous I/O. [`Expat`](https://directory.fsf.org/wiki/License:Expat)
  • libevent - Event loop replacement for network servers. [`3-clause BSD`](https://directory.fsf.org/wiki/License:BSD-3-Clause)
  • libgss - Generic Security Service. [`GNU GPL3 or later`](http://www.gnu.org/licenses/gpl-3.0.html)
  • libhttpd - Library to add basic web server capabilities to an application or embedded device. [`GNU GPL2`](http://www.gnu.org/licenses/gpl-3.0.html)
  • libidn - Implementation of the Stringprep, Punycode and IDNA specifications. [`GNU GPL3 or later`](http://www.gnu.org/licenses/gpl-3.0.html)
  • libmicrohttpd - Small C library that makes it easy to run an HTTP server as part of another application. [`GNU LGPL2.1 or later`](http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html)
  • libsagui - Sagui is a cross-platform C library which helps to develop web servers or frameworks. [`GNU LGPL3`](http://www.gnu.org/licenses/lgpl-3.0.html)
  • libvldmail - Your friendly e-mail address validation library. [`WTFPLv2`](http://www.wtfpl.net/txt/copying/)
  • lwan - Experimental, scalable, high-performance HTTP server. [`GNU GPL2.1`](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
  • mongoose - Embedded web server for C. [`GNU GPL2.1`](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
  • MQTT-C - Portable MQTT C client for embedded systems and PCs alike. [`MIT`](https://raw.githubusercontent.com/LiamBindle/MQTT-C/master/LICENSE)
  • nanomsg - C-based implementation of ZeroMQ. [`Expat`](https://directory.fsf.org/wiki/License:Expat)
  • OpenSSL - Implementation of the SSL and TLS protocols, and also includes a cryptography library. [`Dual Licensed under the OpenSSL License and the SSLeay License`](https://www.openssl.org/source/license.html)
  • oSip - SIP implementation in C without additional dependencies. [`GNU LGPLv2.1 or later`](http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html)
  • pig - Linux packet crafting tool. [`GPL2`](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
  • s2n - C99 implementation of the TLS/SSL protocols, designed to be simple, fast and with security as a priority. [`Apache 2.0`](https://directory.fsf.org/wiki/License:Apache-2.0)
  • socket99 - C99 wrapper for the BSD sockets API. [`ISC`](https://directory.fsf.org/wiki/License:ISC)
  • Tox - Communication platform, designed to be a Skype-killer. [`GNU GPL3`](http://www.gnu.org/licenses/gpl-3.0.html)
  • twitc - Mini C library for interacting with the Twitter OAuth API. [`Expat`](https://directory.fsf.org/wiki/License:Expat)
  • librg - Library for building simple and elegant cross-platform mmo client-server solutions. [`Apache 2.0`](https://directory.fsf.org/wiki/License:Apache-2.0)
  • dyad - Asynchronous networking library. [`MIT`](https://raw.githubusercontent.com/atom/atom/master/LICENSE.md)
  • h2o - Optimized HTTP/1, HTTP/2 high performance server/library. [`MIT`](https://raw.githubusercontent.com/atom/atom/master/LICENSE.md)
  • balde - Microframework for C based on GLib. [`GNU LGPLv2.1`](http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html)
  • onion - C library to create simple HTTP servers and Web Applications. [`Apache 2.0`](https://directory.fsf.org/wiki/License:Apache-2.0)
  • kore - Easy to use, scalable and secure web application framework for writing web APIs in C.
  • klone - KLone is a fully-featured, multiplatform, web application development framework.
  • duda - Duda I/O is an event-driven and high performant web services framework written in C. [`Apache 2.0`](https://directory.fsf.org/wiki/License:Apache-2.0)
  • apophenia - Library for statistical and scientific computing. [`GNU GPL2.1`](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
  • ATLAS - Automatically Tuned Linear Algebra Software. [`3-clause BSD`](https://directory.fsf.org/wiki/License:BSD-3-Clause)
  • BLAS - Basic Linear Algebra Subprograms; a set of routines that provide vector and matrix operations. [`BLAS license`](http://www.netlib.org/blas/#_licensing)
  • CDFLIB - Library with routines to evaluate cumulative density functions fo a variety of standard probability distributions. Also can compute one parameter of the CDF given the others. (No license given)
  • cmathl - Pure-C Math library with a great variety of mathematical functions and CMake build support. Seeks to be close to C89/C90 compliant for portability. [`MIT`](https://github.com/ScientificC/cmathl/blob/master/LICENSE)
  • Cuba - Library for multidimensional numerical integration. [`GNU LGPLv3`](http://www.gnu.org/licenses/lgpl-3.0.html)
  • FFTW - The Fastest Fourier Transform in the West; a highly-optimized fast Fourier transform routine. [`GNU GPL2.1 or later`](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
  • FLINT - Fast Library for Number Theory; a library supporting arithmetic with numbers, polynomials, power series and matrices, among others. [`GNU GPL2.1 or later`](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
  • GLPK - GNU Linear Programming Kit; a package designed for solving large-scale linear programming, mixed integer programming and other related problems. [`GNU GPL3 or later`](http://www.gnu.org/licenses/gpl-3.0.html)
  • GMP - GNU Multple Precision Arithmetic Library; a library for arbitrary-precision arithmetic. [`GNU GPL2.1`](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html) and [`GNU LGPLv3`](http://www.gnu.org/licenses/lgpl-3.0.html)
  • GNU MPC - Library for complex number arithmetic. [`GNU LGPL3 or later`](http://www.gnu.org/licenses/lgpl-3.0.html)
  • GNU MPFR - Library for arbitrary-precision floating-point arithmetic. [`GNU LGPL3 or later`](http://www.gnu.org/licenses/lgpl-3.0.html) or [`GNU LGPL2.1 or later (until version 2.4.x)`](http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html)
  • GNU MPRIA - Portable mathematics library for multi-precision rational interval arithmetic. [`GNU GPL3 or later`](http://www.gnu.org/licenses/gpl-3.0.html)
  • GSL - The GNU Scientific Library; a sophisticated numerical library. [`GNU GPL3`](http://www.gnu.org/licenses/gpl-3.0.html)
  • igraph - Library for creating and manipulating large graphs. [`GNU GPL2`](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
  • KISS FFT - Very simple fast Fourier transform library. [`3-clause BSD`](https://directory.fsf.org/wiki/License:BSD-3-Clause)
  • LAPACKE - C interface to [LAPACK](http://www.netlib.org/lapack/). [`3-clause BSD`](https://directory.fsf.org/wiki/License:BSD-3-Clause)
  • PARI/GP - Computer algebra system for number theory; includes a compiler to C. [`GNU GPL2.1 or later`](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
  • PETSc - Suite of data structures and routines for scalable parallel solution of scientific applications modelled by partial differential equations. [`FreeBSD`](https://directory.fsf.org/wiki?title=License:FreeBSD)
  • PROB - Library that handles various discrete and continuous probability density functions. [`GNU LGPL3`](https://people.sc.fsu.edu/~jburkardt/txt/gnu_lgpl.txt)
  • Yeppp! - Very fast, SIMD-optimized mathematical library. [`3-clause BSD`](https://directory.fsf.org/wiki/License:BSD-3-Clause)
  • cchan - Small library for channel constructs for inter-thread communication. [`Public Domain`](https://creativecommons.org/share-your-work/public-domain/)
  • ck - Concurrency primitives, safe memory reclamation mechanisms and non-blocking data structures. [`FreeBSD`](https://directory.fsf.org/wiki?title=License:FreeBSD)
  • mill - Go-style concurrency in C. [`X11`](https://directory.fsf.org/wiki/License:X11)
  • libdill - Structured concurrency in C. [`X11`](https://directory.fsf.org/wiki/License:X11)
  • MPICH - Another implementation of MPI. [`MPICH licence`](http://git.mpich.org/mpich.git/blob_plain/6aab201f58d71fc97f2c044d250389ba86ac1e3c:/COPYRIGHT)
  • OpenMP - Set of C pragmas designed to allow for easy parallelization of code. [`3-clause BSD`](https://opensource.org/licenses/BSD-3-Clause)
  • OpenMPI - Message passing interface implementation. [`3-clause BSD`](https://directory.fsf.org/wiki/License:BSD-3-Clause)
  • pth - Portable implementation for non-preemptive priority-based scheduling for multiple threads of execution. [`GNU GPL3 or later`](http://www.gnu.org/licenses/gpl-3.0.html)
  • pthreads - The POSIX thread library.
  • SLEPc - Software library for the solution of large, sparse eigenvalue problems on parallel computers. [`GNU LGPL3`](http://www.gnu.org/licenses/lgpl-3.0.html)
  • TinyCThread - Portable, small implementation of the C11 threads API. [`zlib`](https://directory.fsf.org/wiki/License:Zlib)
  • hammer - Parser combinators for binary formats. [`GNU GPL2.1`](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
  • iniparser - Parser for `.ini` files. [`Expat`](https://directory.fsf.org/wiki/License:Expat)
  • libconfini - Yet another INI parser. [`GNU GPL3 or later`](http://www.gnu.org/licenses/gpl-3.0.html)
  • libYAML - YAML 1.1 parser and emitter. [`Expat`](https://directory.fsf.org/wiki/License:Expat)
  • mpc - Parser combinator library. [`FreeBSD`](https://directory.fsf.org/wiki?title=License:FreeBSD)
  • libucl - Universal configuration library parser. [`FreeBSD`](https://directory.fsf.org/wiki?title=License:FreeBSD)
  • PCRE - Implementation of regexes identical to that of Perl 5. [`3-clause BSD`](https://directory.fsf.org/wiki/License:BSD-3-Clause)
  • regexp4 - Simple and complete implementation of regular expressions with its own sintax. [`GNU GPL3 or later`](http://www.gnu.org/licenses/gpl-3.0.html)
  • SLRE - Super Light Regular Expression library; a very small implementation of a subset of Perl regex syntax. [`GNU GPL2.1`](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
  • sregex - Non-backtracking NFA/DFA-based Perl-compatible regex engine library. [`3-clause BSD`](https://opensource.org/licenses/BSD-3-Clause)
  • TRE - POSIX-compliant, feature-full regex library. [`FreeBSD`](https://directory.fsf.org/wiki?title=License:FreeBSD)
  • binn - Binary serialization format meant to be compact, fast and easy-to-use. [`Apache 2.0`](https://directory.fsf.org/wiki/License:Apache-2.0)
  • c-capnproto - Implementation of the Cap'n Proto serialization protocol. [`Expat`](https://directory.fsf.org/wiki/License:Expat)
  • cmp - Implementation of the [MessagePack](https://msgpack.org/) serialization protocol. [`Expat`](https://directory.fsf.org/wiki/License:Expat)
  • libavro - C implementation of the Avro data serialization system. [`Apache 2.0`](https://directory.fsf.org/wiki/License:Apache-2.0)
  • mpack - Another implementation of the [MessagePack](https://msgpack.org/) serialization protocol. [`Expat`](https://directory.fsf.org/wiki/License:Expat)
  • netstring-c - Netstring encoder and decoder. [`Public Domain`](https://creativecommons.org/share-your-work/public-domain/)
  • protobuf-c - Implementation of Google Protocol Buffer in C. [`FreeBSD`](https://directory.fsf.org/wiki?title=License:FreeBSD)
  • xdr - External Data Representation; a standard for data serialization.
  • CCAN - Modelled after Perl's CPAN, this is a big collection of C code that does stuff. The full list is [here](http://ccodearchive.net/list.html).
  • clib - Something of a package manager for C. Comes with a [bunch of libraries of its own](https://github.com/clibs/clib/wiki/Packages). [`Expat`](https://directory.fsf.org/wiki/License:Expat)
  • gnulib - Collection of common GNU code.
  • libdjb - Collection of libraries doing various things. [`(Apparently) Public Domain`](https://creativecommons.org/share-your-work/public-domain/)
  • Bionic - Google's C standard library, developed for Android. [`3-clause BSD`](https://directory.fsf.org/wiki/License:BSD-3-Clause)
  • dietlibc - C standard library designed for the smallest possible binaries. [`GNU GPL2.1`](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
  • glibc - The GNU C Library; an implementation of the C standard library. [`GNU LGPL2.1`](http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html)
  • musl - Standard C library, compatible with POSIX 2008 and C11. Designed for static linking. [`Expat`](https://directory.fsf.org/wiki/License:Expat)
  • bstrlib - The Better String Library. [`3-clause BSD`](https://directory.fsf.org/wiki/License:BSD-3-Clause) and [`GNU GPL2.1`](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
  • ICU - International Components for Unicode; a library for Unicode support. [`ICU license`](http://source.icu-project.org/repos/icu/icu/tags/latest/LICENSE)
  • libunistring - Library for manipulating Unicode strings in C. [`GNU LGPL3`](http://www.gnu.org/licenses/lgpl-3.0.html)
  • libgiconv - Text conversion library. [`GNU LGPL2.1 (library)`](http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html) or [`GNU GPL3 (*iconv* program)`](http://www.gnu.org/licenses/gpl-3.0.html)
  • SDS - Simple Dynamic Strings; a library for handling C strings in a simpler way, but one that is compatible with normal C string functions. Available via [clib](https://github.com/clibs/clib). [`FreeBSD`](https://directory.fsf.org/wiki?title=License:FreeBSD)
  • shoco - Compressor for small text strings. [`Expat`](https://directory.fsf.org/wiki/License:Expat)
  • smaz - Efficient string compression library. [`3-clause BSD`](https://directory.fsf.org/wiki/License:BSD-3-Clause)
  • utf8.h - Single header utf8 string functions. [`Unlicense`](https://unlicense.org/)
  • utf8proc - Small, clean library for processing UTF-8 Unicode data. [`License`](https://github.com/JuliaStrings/utf8proc/blob/master/LICENSE.md)
  • CHEAT - Very simple unit testing framework. [`FreeBSD`](https://directory.fsf.org/wiki?title=License:FreeBSD)
  • Check - Unit testing framework for C. [`GNU LGPL2.1`](http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html)
  • CMock - Mock/stub generator for C. [`Expat`](https://directory.fsf.org/wiki/License:Expat)
  • cmocka - Unit testing framework with support for mock objects. [`Apache 2.0`](https://directory.fsf.org/wiki/License:Apache-2.0)
  • Criterion - KISS, non-intrusive C test framework. [`Expat`](https://directory.fsf.org/wiki/License:Expat)
  • CUnit - Another unit testing framework for C. [`GNU LGPL2.0`](http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html)
  • Cutest - Library for unit testing with memory leak detection (Linux, freeBSD and Windows). [`GPL2`](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
  • minunit - Minimal unit testing framework for C. [`Expat`](https://directory.fsf.org/wiki/License:Expat)
  • munit - Small but full-featured unit testing framework for C with no dependencies. [`MIT`](https://raw.githubusercontent.com/atom/atom/master/LICENSE.md)
  • Unity - Simple unit testing framework for C. [`Expat`](https://directory.fsf.org/wiki/License:Expat)
  • linter-clang - Lint C code in Atom, using Clang. [`MIT`](https://raw.githubusercontent.com/atom/atom/master/LICENSE.md)
  • linter-gcc - Lint C code in Atom, using GCC. [`MIT`](https://raw.githubusercontent.com/atom/atom/master/LICENSE.md)
  • CEDET - Collection of Emacs Development Environment Tools; designed to provide IDE-like features to Emacs. Built-in. [`GNU GPL3 or later`](http://www.gnu.org/licenses/gpl-3.0.html)
  • Flycheck - Modern syntax checking. For C, it can use either GCC or Clang as a back-end. [`GNU GPL3 or later`](http://www.gnu.org/licenses/gpl-3.0.html)
  • Yasnippet - Template system, with C templates for common code snippets. [`GNU GPL3 or later`](http://www.gnu.org/licenses/gpl-3.0.html)
  • Syntastic - Syntax checking and linting. [`Do What The Fuck You Want To license`](https://github.com/vim-syntastic/syntastic/blob/master/LICENCE)
  • YouCompleteMe - Code completion engine for Vim. [`GNU GPL3`](http://www.gnu.org/licenses/gpl-3.0.html)
  • Artistic Style - Fast and small automatic source code formatter that supports C. [`GNU LGPL3`](http://www.gnu.org/licenses/lgpl-3.0.html)
  • address-sanitizer - Fast memory error detector. [`Apache 2.0`](https://directory.fsf.org/wiki/License:Apache-2.0)
  • biicode - Modern dependency manager for C. [`Expat`](https://directory.fsf.org/wiki/License:Expat)
  • c - Compile and execute C "scripts" in one go on the command line. Also has shebang support. [`Expat`](https://directory.fsf.org/wiki/License:Expat)
  • c99sh - Run C files using hash-bang. [`FreeBSD`](https://directory.fsf.org/wiki?title=License:FreeBSD)
  • CBMC - C Bounded Model Checker; a tool for verification of array bounds, pointer safety and user-specified assertions. [`Original BSD`](https://directory.fsf.org/wiki/License:BSD-4-Clause)
  • cdecl - Online service to translate C declarations into English and vice versa. [`Public Domain`](https://creativecommons.org/share-your-work/public-domain/)
  • cinclude2dot - Graphs include dependencies in a C project using Graphviz. [`Any GNU GPL version (due to underspecification in the file)`](https://directory.fsf.org/wiki/Cinclude2dot#tab=Details)
  • Complexity - Tool for measuring the complexity of C source code. [`GNU GPL3 or later`](http://www.gnu.org/licenses/gpl-3.0.html)
  • CScout - Source code analyzer and refactoring browser for collections of C programs. [`GNU GPL3`](http://www.gnu.org/licenses/gpl-3.0.html)
  • DDD - Graphical front-end for a range of command-line debuggers. [`GNU GPL3 or later`](http://www.gnu.org/licenses/gpl-3.0.html)
  • GDB - The GNU Project debugger; a debugger for C. [`GNU GPL3 or later`](http://www.gnu.org/licenses/gpl-3.0.html)
  • Glade - RAD tool to enable quick development of GTK+ GUIs. [`GNU GPL2.1`](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
  • GMSL - GNU Make Standard Library; a collection of additional functionality for GNU Make. [`3-clause BSD`](https://directory.fsf.org/wiki/License:BSD-3-Clause)
  • GNU Global - Source code tagging tool which works with C. [`GNU GPL3`](http://www.gnu.org/licenses/gpl-3.0.html)
  • gprof - Performance analysis tool. Part of GNU binutils. [`GNU GPL3 or later`](http://www.gnu.org/licenses/gpl-3.0.html)
  • Highlight - Converts source code to formatted text with nice highlighting. [`GNU GPL3`](http://www.gnu.org/licenses/gpl-3.0.html)
  • 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://directory.fsf.org/wiki/License:NCSA)
  • indent - Formats C source code automatically to make it easier to read. Also converts from one style of source to another. [`GNU GPLv3 or later`](http://www.gnu.org/licenses/gpl-3.0.html)
  • rr - Debugger that records non-deterministic executions to allow for deterministic debugging. [`FreeBSD`](https://directory.fsf.org/wiki?title=License:FreeBSD)
  • tup - Very fast, file-based, cross-platform build system. [`GNU GPL2.1`](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
  • unifdef - Removes #ifdef and #if directives with their delimited text without touching any other part of the file. [`3-clause BSD`](https://directory.fsf.org/wiki/License:BSD-3-Clause) and [`FreeBSD`](https://directory.fsf.org/wiki?title=License:FreeBSD)
  • Valgrind - Range of dynamic analysis tools, including a leak checker. [`GNU GPL2.1`](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
  • ApeTagLibs - C library for working with APEv2 tags. [`Expat`](https://directory.fsf.org/wiki/License:Expat)
  • bfd - Library for manipulating binary object files. Part of GNU binutils. [`GNU GPL3 or later`](http://www.gnu.org/licenses/gpl-3.0.html)
  • cf4ocl - The C Framework for OpenCL; a cross-platform object-oriented framework for developing and benchmarking [OpenCL](https://www.khronos.org/opencl/) projects. [`GNU LGPL3 (library)`](http://www.gnu.org/licenses/lgpl-3.0.html) or [`GNU GPL3 (project code)`](http://www.gnu.org/licenses/gpl-3.0.html)
  • CommonMark - C implementation of the CommonMark spec. [`Various Licenses`](https://github.com/commonmark/commonmark-spec/blob/master/LICENSE)
  • CException - C implementation of exceptions. [`Expat`](https://directory.fsf.org/wiki/License:Expat)
  • docopt.c - C implementation of a command-line option parser. [`Expat`](https://directory.fsf.org/wiki/License:Expat)
  • dyncall - Another foreign function interface library. [`Expat`](https://directory.fsf.org/wiki/License:Expat)
  • FANN - Fast Artifical Neural Network library; an implementation of neural networks. [`GNU GPL2.1`](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
  • Firm - C 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. [`GNU LGPLv2.1`](http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html)
  • Genann - Simple neural network library in C. [`Zlib`](https://directory.fsf.org/wiki/License:Zlib)
  • gjrand - Library of random-number generation routines. [`GNU GPL2.1`](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html) or [`GNU GPLv3`](http://www.gnu.org/licenses/gpl-3.0.html)
  • GNU FreeIPMI - In-band and out-of-band IPMI implementation. [`GNU GPL3`](http://www.gnu.org/licenses/gpl-3.0.html)
  • GNU gperf - Perfect hash function generator, given a list of strings. Outputs C code. [`GNU GPL3 or later`](http://www.gnu.org/licenses/gpl-3.0.html)
  • GNU Libffcall - Collection of libraries for building foreign function interfaces. [`GNU GPL3 or later`](http://www.gnu.org/licenses/gpl-3.0.html)
  • gperftools - Collection of utilities for measuring and improving performance. [`3-clause BSD`](https://directory.fsf.org/wiki/License:BSD-3-Clause)
  • huffandpuff - Minimal Huffman encoder and decoder. [`Public Domain`](https://creativecommons.org/share-your-work/public-domain/)
  • kdtree - Simple library for working with KD-trees. [`3-clause BSD`](https://directory.fsf.org/wiki/License:BSD-3-Clause)
  • Kitsune - Efficient, general-purpose framework for dynamic software updating. [`GNU LGPL3 or later`](http://www.gnu.org/licenses/lgpl-3.0.html)
  • libavl - Library containing a range of self-balancing binary trees. [`GNU GPL3 or later`](http://www.gnu.org/licenses/gpl-3.0.html)
  • libbson - BSON utility library. [`Apache 2.0`](https://directory.fsf.org/wiki/License:Apache-2.0)
  • libCello - Library introducing higher-level programming to C. [`3-clause BSD`](https://directory.fsf.org/wiki/License:BSD-3-Clause)
  • libffi - Portable foreign-function interface library. [`Expat`](https://directory.fsf.org/wiki/License:Expat)
  • libgit2 - Pure C implementation of Git. [`GNU GPL2 only, with a linking exception`](https://github.com/libgit2/libgit2/blob/master/COPYING)
  • libimobiledevice - Cross-platform protocol library to communicate with iThings. [`GNU LGPLv2.1 or later (library)`](http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html) or [`GNU GPL2.1 or later (tools)`](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
  • libnfc - Platform-independent Near-Field Communication library. [`GNU LGPL3`](http://www.gnu.org/licenses/lgpl-3.0.html)
  • libPhenom - Deprecated, here for archival purposes. Eventing framework for building high-scalability and high-performance systems. [`Apache 2.0`](https://directory.fsf.org/wiki/License:Apache-2.0)
  • ncurses - Coloured terminal UI library. [`GNU GPL3 or later`](http://www.gnu.org/licenses/gpl-3.0.html)
  • nope.c - C-language-based, ultra-light software platform for scalable server-side and networking applications (think node.js for C programmers). [`GNU GPL2.1`](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
  • pbc - Protocol buffers library. [`Expat`](https://directory.fsf.org/wiki/License:Expat)
  • rabbitmq-c - Client library for [RabbitMQ](https://www.rabbitmq.com/). [`Expat`](https://directory.fsf.org/wiki/License:Expat)
  • Ragel - DSL for state machines that compiles to C. [`GNU GPL2.1`](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
  • Tinyexpr - Tiny recursive-descent parser, compiler and evaluation engine for simple mathematical expressions. [`zlib`](https://directory.fsf.org/wiki/License:Zlib)
  • uthash - Hash table implementation, allowing existing structures to be stored in a hash table easily. [`1-clause BSD`](http://troydhanson.github.io/uthash/license.html)
  • cpu_features - A cross platform C99 library to get cpu features at runtime. [`Apache 2.0`](https://directory.fsf.org/wiki/License:Apache-2.0)
  • pblog - Small, low overhead, structured logging library intended for logging formware events.[`Apache 2.0`](https://directory.fsf.org/wiki/License:Apache-2.0)
  • libelf - ELF object file access library in C. [`GNU GPL2.1`](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
  • mcpp - Portable C preprocessor. [`2-clause BSD`](https://opensource.org/licenses/BSD-2-Clause)
  • libusb - Generic access to USB devices. [`LGPL2.1`](https://github.com/libusb/libusb/blob/master/COPYING)
  • alsa-lib - Userspace library to interact with ALSA. [`LGPL2.1`](https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html)
  • Capstone - Dissasembly/disassembler framework. [`BSD 3-clause`](https://github.com/aquynh/capstone/blob/master/LICENSE.TXT)
  • Expat - Stream-oriented XML parser. [`Expat`](https://directory.fsf.org/wiki/License:Expat)
  • libxml2 - Standards-compliant, portable XML parser. [`Expat`](https://directory.fsf.org/wiki/License:Expat)
  • mini-xml - Small XML reading and writing library. No dependencies aside from C standard library. [`Apache 2.0 with exceptions`](https://github.com/michaelrsweet/mxml/blob/master/LICENSE)
Programming Languages
C 81 C++ 8 Python 4 Shell 2 Emacs Lisp 2 JavaScript 2 Vim script 1 Assembly 1 HTML 1 TypeScript 1
Keywords
c 24 library 8 cpp 3 portable 3 networking 2 ansi 2 compiler 2 hash-functions 2 hashtable 2 framework 2 hashing 2 stack 2 queue 2 performance 2 linkedlist 2 hpc 2 algorithm 2 parser 2 tls 2 cross-platform 2 syntax-checking 2 data-structures 2 network-protocols 1 network-analysis 1 intrusion-prevention 1 hacking-tool 1 hacking 1 iot 1 forensics 1 denial-of-service 1 arp-spoofing 1 pcre 1 simple 1 publisher-subscriber 1 rest 1 email-validation 1 mqtt-client 1 mqtt 1 cmake 1 zpl 1 sync 1 single-header 1 replication 1 network 1 netcode 1 multiplayer 1 low-level 1 lightweight 1 librg 1 header-only 1