Distributed server for social and realtime games and apps
Access GameLift resources and integrate GameLift into your Unity game
Arianne is an engine to develop multiplayer online games like Stendhal
LGSL (Live Game for PHP 5.4-8+: online status for various gameservers
Free MMORPG
Isometric space station 13
A game server framework in Go (golang)
Proxy for games that emulates network conditions like ping and lag.
Upload games to legacy apple // computers via serial and no floppies!
Create your own online real-time browser-based MMO in your website
A free Python 3 text-based MUD game server