Tools for Super Tux Kart server operators
LGSL (Live Game for PHP 5.4-8+: online status for various gameservers
Visual Basic 6 2D online adventure game engine
Low-latency, high quality voice chat for gamers
Immersive and expansive hardcore old-school 2D ORPG (MMORPG)
Anarchy Online Emulator
SA:MP server administration filterscript
Minecraft clone written in C using modern OpenGL
web cms for clans and esport related pages
An OpenSource (C# .NET) TeamPlay Environment.
Server software written in Python that implements the MUCK protocol.
Non-Java Minecraft Classic Server Software
Modular Minecraft server plugin - commands, events, ...
Maniaplanet Server Extender
Cross-platform 2D game engine