A MUD client for Android, iOS, Linux, Mac OS X and Windows
Cooperative multiplayer graphical RPG and adventure game
INSTEAD - Simple Text Adventure Interpreter.
A 2D scrolling platform shooter, inspired by Duke Nukem 1
WW2 U-boat simulation
Hardcore 3D space shooter with spaceship upgrade possibilities.
Zoomable user interface (ZUI) with file manager, file viewers and more
Eureka is a DOOM map editor
Enigma is a puzzle game
A promising chess program
Android, UIQ 3.0, Series 60 Edition 5 open-source software
An open-source Phantasy Star Online server for *nix
Cross-platform, GPL reimplementation of the classic : Syndicate
FLTrator is a retro style scrolling arcade game using FLTK.