This project aims to enhance the working environment on Windows

A free Windows-compatible Operating System

A text editor in less than 1000 LOC with syntax highlight and search.

Sioyek is a PDF viewer with a focus on textbooks and research papers

Higher level programming in C

An open-source OS project that aims to provide source and binary compatibility with macOS® and a similar user experience.

16-bit Windows (Windows 1.x, 2.x, 3.0, 3.1, etc.) on 64-bit Windows

Document viewer

Quibble - the custom Windows bootloader

An updated version of GBDK, C compiler, assembler, linker and set of libraries for the Nintendo Gameboy, Nintendo Entertainment System, Sega Master System, Sega Game Gear.

Custom Minecraft Classic / ClassiCube client written in C from scratch (formerly ClassicalSharp in C#)

Run Linux programs on DOS

Next Generation Custom Firmware for the PSP and Vita's ePSP.

Yori is a CMD replacement shell that supports backquotes, job control, and improves tab completion, file matching, aliases, command history, and more.

A text-based calendar and scheduling application

An open-source SDK for PSP homebrew development.

Patch for Windows 9x to fix CPU issues

A framework + installer to (very) quickly install Windows 98 on anything from a 486 up to a modern system

A MS-DOS Creative Coding IDE/platform based on JavaScript

Decompilation in progress of Animal Crossing for the Nintendo GameCube.

A fan port of Cave Story for the Sega Mega Drive

A minimal new SSH client for Mac OS 7/8/9

A lightweight BASIC interpreter written in standard C in dual files. Aims to be embeddable, extendable and portable.

JPEG artifacts removal based on quantization coefficients.

The cross-platform, open-source SDK to develop for original Xbox: *new* xdk

A libpurple/Pidgin plugin for Discord

Project to recreate your favourite block game for the Wii (Beta 1.7.3)

A Bluetooth exploit for the Nintendo Wii.

Gophernicus is a modern, full-featured (and hopefully) secure gopher daemon

TLS for the Internet of Old Things