0 A.D. is a free, open-source, cross-platform real-time strategy game.
Odamex is a free, cross-platform, modern client-server Doom engine
A 2D multiplayer space shooter game
Network gamepad/joystick
Cross-platform real-time strategy game (3D)
LGSL (Live Game for PHP 5.4-8+: online status for various gameservers
Snakes of Apocalypse is a funny multiplayer game
FreeCS is a free-software reimplementation of Counter-Strike 1.5.
New version of PTkEI2, the cross-platform GUI client for Wolfpack Empi
A funny game for a good company similar to karaoke
Updated client for Battletech MUX game servers
Map creator for the BattlleTech MUX
Pinewood Derby Race Management
C/C++ , PHP, PYTHON, 3D ENGINES, CHROME NATIVE CLIENT
Minecraft Name Availability Checker
Java decentralized cross-platform network multiplayer game engine
The Free Online Multiplayer Hacking Platform Shooter
SA:MP server administration filterscript
The All-in-One music game
A Simple and Easy to Use User Interface for Private Bukkit Servers
Flickit is fun 2d physics arcade style game.
Open Source Virtual World and MMOG Development Platform
An HTML web game platform