Linux kernel source tree

OBS Studio - Free and open source software for live streaming and screen recording

A code-searching tool similar to ack, but faster.

Open-source keyboard firmware for Atmel AVR and Arm USB families

NVIDIA Linux open GPU kernel module source

i3-compatible Wayland compositor

A multi-platform library for OpenGL, OpenGL ES, Vulkan, window and input

FreeRDP is a free remote desktop protocol library and clients

libSQL is a fork of SQLite that is both Open Source, and Open Contributions.

Simple and portable (but not inflexible) GUI library in C that uses the native GUI technologies of each platform it supports.

OpenZFS on Linux and FreeBSD

mimalloc is a compact general purpose allocator with excellent performance.

A tiling window manager for X11

A single-header ANSI C immediate mode cross-platform GUI library

Extremely fast non-cryptographic hash algorithm

Capstone disassembly/disassembler framework for ARM, ARM64 (ARMv8), Alpha, BPF, Ethereum VM, HPPA, LoongArch, M68K, M680X, Mips, MOS65XX, PPC, RISC-V(rv32G/rv64G), SH, Sparc, SystemZ, TMS320C64X, T…

minimal cross-platform standalone C headers

A fast entity component system (ECS) for C & C++

The fuzzer afl++ is afl with community patches, qemu 5.1 upgrade, collision-free coverage, enhanced laf-intel & redqueen, AFLfast++ power schedules, MOpt mutators, unicorn_mode, and a lot more!

Antialiased 2D vector drawing library on top of OpenGL for UI and visualizations.

Vim - the text editor - for Mac OS X

Decompilation of The Legend of Zelda: Ocarina of Time

A memory profiler for Linux.

Audio playback and capture library written in C, in a single source file.

A Linux version of the Procmon Sysinternals tool

A native, user-mode, multi-process, graphical debugger.

A tiny immediate-mode UI library

A simple logging library implemented in C99

Midnight Commander's repository

Implementations of SIMD instruction sets for systems which don't natively support them.