Complete Open Source and Modular solution for MMO
LSJ-Server-Terra (Java Multipurpose Sever connected with MariaDB)
Open Source MMORPG Framework
Experimental PlayStation Vita emulator
You can make it - Open Source MMORPG Platform
Python MUD/MUX/MUSH/MU* development system
Classic America's Army
Arianne is an engine to develop multiplayer online games like Stendhal
Your collection, your way
Lucifer: The Ultimate Dev-Ecosystem
GameServer is a sophisticated, game server designed for online games
Visual Basic 6 2D online adventure game engine
Analysis of Oware (Abapa) games
The multiplayer game engine
Python package useful to retrieve and manage the data of IMDb
Java Settlers
server controller for trackmania
Playing Go with web-based turn-based Go server
Dark Age of Camelot server emulator
A mobile game distributed server implemented using netty4.X