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C Libraries for Linux

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Browse free open source C Libraries for Linux and projects below. Use the toggles on the left to filter open source C Libraries for Linux by OS, license, language, programming language, and project status.

  • MongoDB Atlas runs apps anywhere Icon
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  • 1
    FluidSynth

    FluidSynth

    A real-time SoundFont software synthesizer

    A real-time software synthesizer based on the SoundFont 2 specifications. It can be used for live audio synthesis of MIDI events or for rendering MIDI files to disk, using SoundFont instruments. It can also be embedded in other applications. This is not a application with a graphical user interface, however there are several GUI applications which utilize FluidSynth.
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    Downloads: 138 This Week
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  • 2
    WebP Codec

    WebP Codec

    Library to encode and decode images in WebP format

    libwebp is the reference codec library for Google’s WebP image format, providing both encoding and decoding along with command-line tools. It supplies cwebp to compress images into WebP and dwebp to decompress them back, making it easy to test quality/size trade-offs across presets and tuning parameters. The GitHub repository is a mirror; the canonical source of truth lives on Chromium’s git, and developer docs are hosted on WebP’s portal. The project underpins WebP support across browsers, imaging libraries, and many native apps thanks to its stable C API. Additional companion repos host test data and demos, including JavaScript builds and timing tests for various platforms. As a widely deployed codec, libwebp balances compression efficiency, speed, and integration simplicity across platforms.
    Downloads: 19 This Week
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  • 3
    Open source DKIM library, MTA filter implementation and associated tools.
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    Downloads: 99 This Week
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  • 4
    Expat

    Expat

    Fast streaming XML parser written in C99 with >90% test coverage

    Welcome to Expat, a stream-oriented XML parser library written in C. Expat excels with files too large to fit RAM, and where performance and flexibility are crucial. There are a number of applications, libraries, and hardware using Expat, as well as bindings and 3rd-party wrappers. Expat is packaged everywhere. This is Expat, a C99 library for parsing XML 1.0 Fourth Edition, started by James Clark in 1997. Expat is a stream-oriented XML parser. This means that you register handlers with the parser before starting the parse. These handlers are called when the parser discovers the associated structures in the document being parsed. A start tag is an example of the kind of structure for which you may register handlers.
    Downloads: 18 This Week
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    IT Asset Management (ITAM) Software

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  • 5
    LVGL

    LVGL

    Powerful and easy-to-use embedded GUI library with many widgets

    Powerful and easy-to-use embedded GUI library with many widgets, advanced visual effects (opacity, antialiasing, animations), and low memory requirements (16K RAM, 64K Flash). LVGL provides everything you need to create an embedded GUI with easy-to-use graphical elements, beautiful visual effects, and a low memory footprint. LVGL is an open-source graphics library providing everything you need to create an embedded GUI with easy-to-use graphical elements, beautiful visual effects, and a low memory footprint. Create stunning user interfaces with LVGL! Take advantage of its platform-independent nature and use one library with small microcontrollers or high-end processors. The LVGL is a lightweight embedded library for displays and touchscreens providing everything required to build fully featured-embedded GUIs. Do you like Python? Create your UI in MicroPython with LVGL.
    Downloads: 17 This Week
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  • 6
    HIDAPI library

    HIDAPI library

    A Simple cross-platform library for communicating with HID devices

    HIDAPI is a multi-platform library that allows an application to interface with USB and Bluetooth HID-Class devices on Windows, Linux, FreeBSD, and macOS. HIDAPI can be either built as a shared library (.so, .dll or .dylib) or can be embedded directly into a target application by adding a single source file (per platform) and a single header.
    Downloads: 16 This Week
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  • 7
    Quake3e

    Quake3e

    Improved Quake III Arena engine

    Quake3e is a modernized fork of id Software’s Quake III Arena engine, tailored for mod developers and competitive players. It includes numerous technical improvements while preserving the core gameplay and mod compatibility of the original. Focused on performance, security, and extended modding capabilities, it has become a popular base for competitive tournaments and engine forks. With its updated rendering path and support for high refresh rates, Quake3e offers a slick and responsive gameplay experience for old-school FPS fans.
    Downloads: 15 This Week
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  • 8
    libevent

    libevent

    Event notification library

    The libevent API provides a mechanism to execute a callback function when a specific event occurs on a file descriptor or after a timeout has been reached. Furthermore, libevent also support callbacks due to signals or regular timeouts. libevent is meant to replace the event loop found in event driven network servers. An application just needs to call event_dispatch() and then add or remove events dynamically without having to change the event loop. The internal event mechanism is completely independent of the exposed event API, and a simple update of libevent can provide new functionality without having to redesign the applications. As a result, Libevent allows for portable application development and provides the most scalable event notification mechanism available on an operating system. Libevent can also be used for multi-threaded applications, either by isolating each event_base so that only a single thread accesses it, or by locked access to a single shared event_base.
    Downloads: 15 This Week
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  • 9
    [OFFICIAL] tinyfiledialogs C C++ v3.21.3

    [OFFICIAL] tinyfiledialogs C C++ v3.21.3

    inputbox password WIN OSX GTK QT Console VCPKG C# Lua R Fortran Pascal

    one C/C++ file & header ==> 8 functions: - beep - tray notify popup - message & question - input & password - save file - open file(s) - select folder - color picker complements OpenGL Vulkan GLFW GLUT GLUI VTK SFML TGUI SDL Ogre Unity3d ION OpenCV CeGui MathGL GLM CPW GLOW Open3D ImGui MyGui GLT NGL STB Nuklear Fenster MicroUi & head-less programs NO INIT NO MAIN LOOP NO LINKING NO INCLUDE win (XP to 11) ASCII MBCS UTF-8 UTF-16 (wchar_t) - native dialogs osx/unix ASCII UTF-8 - applescript kdialog zenity shanty … ° SSH console / X forwarding / waypipe Wayland ° the dialogs can be forced into console mode ° curses dialogs via Dialog.exe/Dialog (disabled by default) C89/C23 & C++98/C++23 compliant VisualStudio MinGW GCC Clang TinyCC IntelCC OWCC BCC SunCC on Windows Mac Linux Bsd Solaris Minix Raspbian Flatpak Haiku bindings: VCPKG C# R Lua Rust Haskell Java AllegroBasic Fortran Pascal D JavaScript Kotlin click tab 'Files' for prototypes
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    Downloads: 74 This Week
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  • 10
    TFT_eSPI

    TFT_eSPI

    Arduino and PlatformIO IDE compatible TFT library

    An Arduino IDE compatible graphics and fonts library for 32-bit processors. The library is targeted at 32-bit processors, it has been performance-optimized for STM32, ESP8266 and ESP32 types. The library can be loaded using the Arduino IDE's Library Manager. Direct Memory Access (DMA) can be used with the ESP32, RP2040, and STM32 processors to improve rendering performance. "Four wire" SPI and 8 bit parallel interfaces are supported. Due to the lack of GPIO pins, the 8-bit parallel interface is NOT supported on the ESP8266. 8 bit parallel interface TFTs (e.g. UNO format mcufriend shields) can use with the STM32 Nucleo 64/144 range or the UNO format ESP32. ILI9341 and ST7796 SPI-based displays are recommended as starting points for experimenting with this library. The library supports some TFT displays designed for the Raspberry Pi (RPi) that are based on a ILI9486 or ST7796 driver chip with a 480 x 320-pixel screen.
    Downloads: 14 This Week
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  • 11

    yafu

    Automated integer factorization

    Check yafu on github for the latest code. YAFU (with assistance from other free software) uses the most powerful modern algorithms (and implementations of them) to factor input integers in a completely automated way. The automation within YAFU is state-of-the-art, combining factorization algorithms in an intelligent and adaptive methodology that minimizes the time to find the factors of arbitrary input integers. Most algorithm implementations are multi-threaded, allowing YAFU to fully utilize multi- or many-core processors (including SNFS, GNFS, SIQS, and ECM). YAFU is primarily a command-line driven tool. You provide the number to factor and, via screen output and log files, YAFU will provide you the factors. There is also an interactive environment similar to MATLAB or PARI/GP, where you can type commands and store results. YAFU is very customizable, through the optional use of many many command line parameters and a very capable expression inter
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    Downloads: 77 This Week
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  • 12
    Cosmopolitan

    Cosmopolitan

    Build-once run-anywhere c library

    Cosmopolitan Libc makes C a build-once run-anywhere language, like Java, except it doesn't need an interpreter or virtual machine. Instead, it reconfigures stock GCC and Clang to output a POSIX-approved polyglot format that runs natively on Linux + Mac + Windows + FreeBSD + OpenBSD + NetBSD + BIOS with the best possible performance and the tiniest footprint imaginable. Cosmopolitan can be compiled from source on any Linux distro. GNU make needs to be installed beforehand. This is a freestanding hermetic repository that bootstraps using a vendored static gcc9 executable. No further dependencies are required.
    Downloads: 13 This Week
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  • 13
    libplacebo

    libplacebo

    Official mirror of libplacebo

    libplacebo is a flexible, high-performance graphics library built on top of Vulkan, designed to provide reusable GPU-accelerated components for media applications. It originated as a core part of the rendering pipeline for the mpv media player and has since grown into a standalone library used for tone mapping, dithering, color space conversion, and more. libplacebo is ideal for developers looking to integrate sophisticated video rendering and post-processing into their own applications with full control over shaders and rendering stages.
    Downloads: 13 This Week
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  • 14
    Shockolate

    Shockolate

    A minimalist and cross platform System Shock source port

    SystemShock is the open-source reimplementation of System Shock, a groundbreaking 1994 cyberpunk FPS/RPG hybrid originally developed by Looking Glass Studios. This project reverse-engineers the original DOS game, porting it to modern systems while preserving gameplay, visuals, and audio as authentically as possible. It uses SDL2 and modern C++ to bring the classic experience to new platforms, with options for widescreen support and quality-of-life enhancements. SystemShock’s open codebase allows the community to contribute fixes, mods, and compatibility improvements.
    Downloads: 11 This Week
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  • 15
    ffmpeg.wasm

    ffmpeg.wasm

    FFmpeg for browser, powered by WebAssembly

    ffmpeg.wasm is a pure WebAssembly (and JavaScript/TypeScript) port of FFmpeg that enables in-browser media recording, conversion, and streaming—letting developers perform video/audio processing entirely client-side without server uploads. Transpiled via Emscripten from FFmpeg and its codecs into WebAssembly. Supports both single-threaded and multi-threaded cores using web workers. Written in TypeScript for improved developer experience.
    Downloads: 11 This Week
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  • 16
    Allegro

    Allegro

    The official Allegro 5 git repository. Pull requests welcome

    Allegro 5 is the latest major revision of the Allegro library, designed to take advantage of modern hardware, including hardware acceleration using 3D cards.
    Downloads: 10 This Week
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  • 17
    minizip-ng

    minizip-ng

    Fork of the zip manipulation library found in the zlib distribution

    minizip-ng is a zip manipulation library written in C that is supported on Windows, macOS, and Linux. Minizip was originally developed by Gilles Vollant in 1998. It was first included in the zlib distribution as an additional code contribution starting in zlib 1.1.2. Since that time, it has been continually improved upon and contributed to by many people. The original project can still be found in the zlib distribution that is maintained by Mark Adler. The motivation behind this repository has been the need for new features and bug fixes to the original library which had not been maintained for a long period of time. The code has been largely refactored and rewritten in order to help improve maintainability and readability. A compatibility layer has been provided for consumers of the original minizip library.
    Downloads: 10 This Week
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  • 18
    BlockHook

    BlockHook

    Hook Objective-C blocks. A powerful AOP tool

    BlockHook is an Objective-C library that enables hooking into the execution of blocks (closures). It allows developers to intercept, modify, and monitor block invocations for debugging, analytics, or altering app behavior.
    Downloads: 9 This Week
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  • 19
    libssh2

    libssh2

    the SSH library

    libssh2 is a client-side C library implementing the SSH2 protocol. The libssh2 offers a large amount of functions and this is an attempt to provide HTML versions of the man pages present in the source tree. These pages are updated automatically from the source code repository.
    Downloads: 9 This Week
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  • 20
    LibVNCServer

    LibVNCServer

    LibVNCServer/LibVNCClient are cross-platform C libraries

    LibVNCServer, a library for easy implementation of a VNC server. VNC is a set of programs using the RFB (Remote Frame Buffer) protocol. They are designed to "export" a frame buffer via net: you set up a server and can connect to it via VNC viewers. If the server supports WebSockets (which LibVNCServer does), you can also connect using an in-browser VNC viewer like noVNC. LibVNCServer/LibVNCClient are cross-platform C libraries that allow you to easily implement VNC server or client functionality in your program.
    Downloads: 8 This Week
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  • 21
    ToaruOS

    ToaruOS

    Hobby operating system, bootloader, kernel, drivers, C library

    ToaruOS is a "complete" operating system for x86-64 PCs and experimental support for ARMv8. While many independent, hobby, and research OSes aim to experiment with new designs, ToaruOS is intended as an educational resource, providing a representative microcosm of functionality found in major desktop operating systems. The OS includes a kernel, bootloader, dynamic shared object linker, C standard library, its own composited windowing system, a dynamic bytecode-compiled programming language, advanced code editor, and dozens of other utilities and example applications. There are no external runtime dependencies and all required source code, totaling roughly 100k lines of (primarily) C, is included in this repository, save for Kuroko, which lives separately. Through out the project, ToaruOS has also attracted quite a few beginner OS developers who have tried to use it as a reference.
    Downloads: 8 This Week
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  • 22
    libuv

    libuv

    Cross-platform asynchronous I/O

    libuv is a high-performance, multi-platform C library focusing on asynchronous I/O, originally developed for Node.js. It provides a consistent event-loop and I/O abstraction layer across a range of systems, making non-blocking operations portable and efficient. Full-featured event loop backed by epoll, kqueue, IOCP, event ports. Asynchronous TCP and UDP sockets. Asynchronous DNS resolution. Asynchronous file and file system operations. File system events, ANSI escape code-controlled TTY. IPC with socket sharing, using Unix domain sockets or named pipes (Windows).
    Downloads: 8 This Week
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  • 23
    DartNative

    DartNative

    Write iOS&macOS&Android Code using Dart

    dart_native is a runtime library that allows Dart to interact with native Objective-C and Java code directly. It enables Flutter and Dart apps to call native platform APIs without writing platform-specific code manually.
    Downloads: 7 This Week
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  • 24
    PHP RdKafka

    PHP RdKafka

    Production-ready, stable Kafka client for PHP

    php-rdkafka is a PHP extension that provides a binding to librdkafka, the C library for Apache Kafka. It enables PHP applications to produce and consume messages efficiently from Kafka topics, supporting both low-level and high-level APIs. The extension is ideal for integrating Kafka into high-performance, real-time systems built with PHP.
    Downloads: 7 This Week
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  • 25
    SuiteSparse

    SuiteSparse

    The official SuiteSparse library: a suite of sparse matrix algorithms

    The official SuiteSparse library: a suite of sparse matrix algorithms authored or co-authored by Tim Davis, Texas A&M University.
    Downloads: 7 This Week
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