How to create an OS from scratch

A tiling window manager for macOS based on binary space partitioning

World's fastest and most advanced password recovery utility

HandBrake's development repository

How to Make a Computer Operating System in C++

Linux shell for iOS

BlackHole is a modern macOS audio loopback driver that allows applications to pass audio to other applications with zero additional latency.

High performance UI layout library in C.

Primary Git Repository for the Zephyr Project. Zephyr is a new generation, scalable, optimized, secure RTOS for multiple hardware architectures.

Learning operating system development using Linux kernel and Raspberry Pi

A Compiler Writing Journey

darktable is an open source photography workflow application and raw developer

RT-Thread is an open source IoT Real-Time Operating System (RTOS). https://rt-thread.github.io/rt-thread/

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

Xv6 for RISC-V

xv6 OS

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…

Smart NFC & ink-Display Card

A minimal programming example for a chat server

Linux namespaces and seccomp-bpf sandbox

Transmits AM radio on computers without radio transmitting hardware.

ClamAV - Documentation is here: https://docs.clamav.net

A tiny immediate-mode UI library

The seL4 microkernel

Linux running inside a PDF file via a RISC-V emulator

A small self-contained alternative to readline and libedit

Tutorial: Writing a "bare metal" operating system for Raspberry Pi 4

LK embedded kernel

Eclipse ThreadX is an advanced real-time operating system (RTOS) designed specifically for deeply embedded applications.