tmux source code

stb single-file public domain libraries for C/C++

How to Make a Computer Operating System in C++

MicroPython - a lean and efficient Python implementation for microcontrollers and constrained systems

build-once run-anywhere c library

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

Learning operating system development using Linux kernel and Raspberry Pi

Legacy mirror of Darwin Kernel. Replaced by https://github.com/apple-oss-distributions/xnu

Open Source Flight Controller Firmware

C in four functions

Box2D is a 2D physics engine for games

Xv6 for RISC-V

xv6 OS

sqlite3 driver for go using database/sql

Quake III Arena GPL Source Release

tiniest x86-64-linux emulator

An open source, embedded, high performance g-code-parser and CNC milling controller written in optimized C that will run on a straight Arduino

Cross-platform Audio Visualizer

htop is an interactive text-mode process viewer for Unix systems. It aims to be a better 'top'.

WebAssembly Micro Runtime (WAMR)

Quake GPL Source Release

Projects for an undergraduate OS course

sc-im - Spreadsheet Calculator Improvised -- An ncurses spreadsheet program for terminal

The seL4 microkernel

Open source STM32 MCU programming toolset

The firmware for the HackRF+PortaPack H1/H2/H4/H4M

Small portable AES128/192/256 in C

RF transmitter for Raspberry Pi

An open source, embedded, high performance g-code-parser and CNC milling controller written in optimized C that will run on a straight Arduino

blingful character graphics/TUI library. definitely not curses.