Self-hosted game stream host for Moonlight
Mangos ZERO is a server for World of Warcraft
Arianne is an engine to develop multiplayer online games like Stendhal
LGSL (Live Game for PHP 5.4-8+: online status for various gameservers
A mobile game distributed server implemented using netty4.X
Massive Multiplayer Online Wargame Leveraging the Internet
Web based Game server control panel
A free Python 3 text-based MUD game server
c# game server framework