Multiplayer online game framework server. GPL

Marauroa 2.2 uses a multithreaded server architecture with a UDP oriented network protocol, a MySQL based persistence engine, and a flexible game system. The game system is totally expandable and modifiable by game developers and is able to run Python scripts defining the game's rules. Marauroa is based on a design philosophy called Action/Perception. Marauroa is totally game agnostic and makes very little assumptions about what are you trying to do, allowing a great freedom to create any game type.

Chess playing server. GPL

MKGI Chess Club 2.1.0 is a chess playing server with a pure Web interface. It features complete player profile management, full html email notification with embedded board display. It also features an interface to match against chess engines such as gnuchess, phalanx, and crafty.