How to create an OS from scratch

A tiling window manager for macOS based on binary space partitioning

A very compact representation of a placeholder for an image.

i3-compatible Wayland compositor

A command line tool that recreates the famous data decryption effect seen in the 1992 movie Sneakers.

The “Quite OK Image Format” for fast, lossless image compression

tiniest x86-64-linux emulator

A completely-from-scratch hobby operating system: bootloader, kernel, drivers, C library, and userspace including a composited graphical UI, dynamic linker, syntax-highlighting text editor, network…

A tiny JavaScript runtime

Linux/FreeBSD DAAP (iTunes) and MPD media server with support for AirPlay 1 and 2 speakers (multiroom), Apple Remote (and compatibles), Chromecast, Spotify and internet radio.

A dead simple tool to sign files and verify digital signatures.

The Computer History Simulation Project

Very fast Markdown parser and HTML generator implemented in WebAssembly, based on md4c

Llama 2 Everywhere (L2E)

A minimal status bar for macOS. Ideal for use with tiling window managers like yabai

A Beautiful Gemini Client

ninja-compatible build tool written in C

A VM with adaptive optimization and JIT compilation, built for Rakudo

Cog - A Free and Open Source Audio Player for macOS 10.13+

A tiny JavaScript runtime for RP2040 (Raspberry Pi Pico)

Playbit System interface defines an OS-like computing platform which can be implemented on a wide range of hosts

A Game Boy (DMG) emulator single header library written in C99. Performance is prioritised over accuracy.

Play Game Boy games on your Playdate.

ANSI Common Lisp implementation

Incremental backup with strong cryptographic confidentiality baked into the data model.

runs stuff in parallel (like GNU parallel, but much faster and memory-efficient)