SKILL files for programming the Commodore C64

Replacement desktop for Atari ST OSes

CrustyBASIC is a Rust-based BASIC cross-compiler for 80s era computers and consoles. It compiles BASIC source into native machine code.

Orca lets you run a fleet of coding agents (e.g. Claude Code, Codex) with your own subscription. Available on desktop, mobile and remote runtime.

Reverse engineer anything with agents, from app behavior down to native binaries.

Open Source Introductory Systems Programming Textbook for the University of Illinois

GEM for the Atari 8-bit — the VDI, the AES and the desktop on a 65C816, at 640x240 on VBXE or 320x192 on stock ANTIC

Doom for C64, on a grid with floor heights

Editor for Scorpion engine (closed source), along with demo games (open source)

Source code to the Amiga FPS classic by Black Magic

A tiny, dependency-free, fixed-function 3D rasteriser written in modern C++17 for embedded devices (ESP32, etc)

A tool which makes it easy to declaratively manage personal forks by automatically merging pull requests

RASTER Music Tracker - RMT

A file explorer tree for Helix

Snappy, batteries-included terminal file manager.

A small cross-platform editor of the OPL3 FM banks of different formats (Downloads in README below)

ESS ESFM bank editor

Doom for computers with only 64 KB of RAM

Clean source port of Super Mario Brothers NES to the Atari Lynx

A fork of a chiptune tracker, supporting import of FamiTracker, AHX, FastTracker II and Protracker modules

Flow Control: a programmer's text editor

Making EhBASIC Better on the RP6502 PicoComputer

Music source files from 1980's Commodore 64 games

A basic shell for the RP6502 picocomputer

OpenArena/Quake III Arena CPMA physics

Port of Quake on Quake III engine

Quake3 OSP mod