Complete Open Source and Modular solution for MMO
Dedicated Game Server Hosting and Scaling for Multiplayer Games
Azuriom is a complete open-source web solution for game servers
Arianne is an engine to develop multiplayer online games like Stendhal
GameServer is a sophisticated, game server designed for online games
Lucifer: The Ultimate Dev-Ecosystem
LGSL (Live Game for PHP 5.4-8+: online status for various gameservers
A fast, scalable, distributed game server engine/framework for C++
Massive Multiplayer Online Wargame Leveraging the Internet
starrydb is game server engine
Web based Game server control panel
An easy to use and powerful game control panel
Nexuiz-Xonotic Client
Create your own online real-time browser-based MMO in your website