Gelide, a configurable frontend for desktops.
Free idle clicker themed around cthulhu
An in-game world editor for civilization 5
Chat Messenger - Open Source Social Network - Online Chess Game
Moteur de jeux de rôles descripifs (RP) en PHP
LGSL (Live Game for PHP 5.4-8+: online status for various gameservers
Solve Go problems (based on GoGrinder GoGrinder.sf.net )
Nurikabe, a great game.
An open source RPG Monster-fighting game