Full featured MUD server with all the trimmings.
Low-latency, high quality voice chat for gamers
Free MMORPG
Aire de jeu de Belote en ligne
plugin-based RPG manager in C++ and Qt5
Moved to http://www.fuzzball.org
A turn-based multiplayer shooting game in the style of Worms
The IRC's Talking Robot
SkipBo! server and Qt client
The original Xivio.com World Server Core
Source for the Flash-based Glitch client
Battleship through network
Modular Minecraft server plugin - commands, events, ...
Multi-user whiteboard emphasizing simplicity.