RetroArch is a frontend for emulators, game engines and media players.
Command and Conquer: Red Alert original source code
A cross-platform port of Hexen II game.
A promising chess program
A 16 bit style game on the 16-bit IBM XT.
Convert PSID and RSID files into C64 executables
DM2CONV/GFXMAKER v3.2 utilities Windows/Linux/macOS x86/x64 port
Low-Level Game Engine for Retro Platforms
Bot for id Software's Wolfenstein 3D
Android, DOS, FirefoxOS, Linux, MacOS and Windows all in one..
A clone of the good old "Pong" game.