Odamex is a free, cross-platform, modern client-server Doom engine
LGSL (Live Game for PHP 5.4-8+: online status for various gameservers
Gets status for Alien Arena servers
Script to start up Nexuiz Linux server at boot time and if it crashes
Web based Game server control panel
Multiplayer mod for the Jedi Knight game series.
MvMTrainer plugin provides 'training' mode for MvM matches of TF2
Cross platform administration tool for Source Engine dedicated servers
qscore is a suite of tools to parse Quake III: Arena games.log
Nexuiz-Xonotic Client
Cube2:Sauerbraten Mod with various features
Tools for installing and setting up dedicated Battlefield servers
Windows rcon GUI for CS:Source servers