Dedicated Game Server Hosting and Scaling for Multiplayer Games
Arianne is an engine to develop multiplayer online games like Stendhal
Lucifer: The Ultimate Dev-Ecosystem
GameServer is a sophisticated, game server designed for online games
A fast, scalable, distributed game server engine/framework for C++
Massive Multiplayer Online Wargame Leveraging the Internet
Nexuiz-Xonotic Client