- browsh: A fully-modern text-based browser, rendering to TTY and browsers
- winfile: Original Windows File Manager (winfile) with enhancements
- MS-DOS: The original sources of MS-DOS 1.25 and 2.0, for reference purposes
- windows95: 💩🚀 Windows 95 in Electron. Runs on macOS, Linux, and Windows.
- zork: Source code for a 1977 version of Zork
- py65: Emulate 6502-based microcomputer systems in Python
- sims: Burroughs B5500, ICL1900, SEL32, IBM 360, IBM 7000 and DEC PDP10 KA10/KI10/KL10, PDP6 simulators for SimH
- simh: The Computer History Simulation Project
- multics: Multiplexed Information and Computing Service (1964, Bell Labs, MIT & GE)
- dps8m: A simulator for the Multics dps-8/m mainframe
- easy6502: None
- metamage_1: Metamage open source, general repository, iteration 1
- ctss: CTSS source and binaries
- Apollo-11: Original Apollo 11 Guidance Computer (AGC) source code for the command and lunar modules.
- EasySXB: EasySXB is a terminal/program loader designed for use with Western Design Center's SXB line of development boards.
- visual6502: Transistor level 6502 Hardware Simulation in Javascript
- furby-source: Transcribed source code of the "FURBY.ASM - Version 25" PDF from http://www.seanriddle.com/furbysource.pdf
- pdp7-unix: A project to resurrect Unix on the PDP-7 from a scan of the original assembly code