Langs, Emulators, OSs, and VMs
An x86 monolithic kernel and operating system written in modern C++. Comes with in-house graphical applications and command line utilities, plus ports of existing software. And yes, it runs DOOM!
FreakC Programming Language - an experimental Batch-like language written in Batch which compiles to Batch
GNO is the UNIX-like environment for the Apple IIgs
[NOT MAINTAINED] Symbiose, a free and flexible webos.
A fast, small, safe, gradually typed embeddable scripting language derived from Lua
80486 emulator with SVGA in BASIC, by jepalza
Highly portable Zilog Z80 CPU emulator written in ANSI C
higan is a multi-system emulator focused on accuracy, preservation, and configurability.
Go compiler for small places. Microcontrollers, WebAssembly (WASM/WASI), and command-line tools. Based on LLVM.
Automatic conversion of the NetBSD src CVS module, use with care. Please submit bugs/changes via https://gnats.netbsd.org
GNU/Cygwin portable distribution - NOTICE: This project is no longer maintained, find us on BitBucket for version 1.0.4
Phoinix, Gameboy Emulator for Palm OS. Import from https://sourceforge.net/projects/phoinix/
PCem with @mattiasgustavsson CRT emulation shader added to it.
A flexible emulator front-end supporting keyboardless navigation and custom system themes.
A portable, open-source 8086 PC emulator for bare metal Raspberry Pi