Pharo Smalltalk VM for iOS and Mac Catalyst — interpreter-only (no JIT), with low-bit oop encoding for ASLR compatibility

C23 compiler targeting Intel 386 (x86-32) and MS-DOS. Shares frontend with uc80 via uc_core.

Shared C23 frontend and AST optimizer for the uc80 (Z80/CP/M) and uc386 (x86-32/MS-DOS) retro C compilers

LR(1)/GLR parser generator. Emits canonical JSON parser tables plus re-entrant driver skeletons in C, C++, Python, and Lua.

Super optimizing C compiler targeting Z80 processor and CP/M operating system

MicroPython port for FreeDOS / i386 — built end-to-end through the uc386 C23 compiler

Headless Pharo test runner with fake GUI — click menus, take screenshots, run SUnit without a display

unix (linux) cowgol to z80 compiler

MS-DOS emulator for Linux: dosbox-staging CPU + cpmemu-style syscall translation

Open source skills for Claude Code - reusable knowledge and algorithms packaged as .claude/skills/ markdown files

c++ implementation of mbasic 5.21

PL/M-80 compiler targeting Zilog Z80 assembly language

Ada compiler targeting Z80 processor and CP/M 2.2 operating system

Modern VM for Smalltalk-80

Resumable replacement for run-parts / cron.daily: per-script completion tracking so re-runs skip what already succeeded this period.

Smalltalk code search engine — indexes packages across Pharo, Squeak, GemStone and more

Standalone validator and export tool for Spur-format Smalltalk image files. Validates heap integrity, class tables, methods, and reachability. Exports per-object SHA-256 manifests (for diffing befo…

Public asset mirror for st80-2026: Xerox Smalltalk-80 v2 virtual image and companion files

Voice-controlled Z-machine interpreter for the visually impaired. Play classic interactive fiction games like Zork entirely by voice on iOS and macOS.

DOS emulator for iPad and Mac — DOSBox-based with SwiftUI interface

Z80/CP/M emulator for iOS and macOS with RomWBW HBIOS compatibility

Microsoft MACRO-80 compatible toolchain for Linux: assembler (um80), linker (ul80), librarian, disassembler

Z80 CP/M emulator for Windows (RomWBW)

Hardware-level Z80 emulator for RomWBW with 512KB ROM + 512KB RAM banking and HBIOS support

CP/M 2.2 emulator with Z80/8080 CPU emulation and BDOS/BIOS translation to Unix filesystem

Universal peephole optimizer for Z80 compilers - pattern-based optimization library

Infocom ZIL/ZILF language compiler producing Z-machine story files (.z3-.z8)

Visual dataflow programming language for macOS, inspired by Prograph

MBASIC 5.21 source code reconstruction - byte-for-byte match with original binary