Open Source MMORPG Framework
Arianne is an engine to develop multiplayer online games like Stendhal
2D Open Source MMORPG
Free MMORPG
An OpenGL client-server game
online 4X browser game engine
PvP, MUD RPG.
Game engine allows you to create own MMORPG
Runescape 2007 / oldschool client with many features.
Modular Gaming Open Source Persistent Browser Based Game Framework
Eve Online Corp Database
Mu Online Launcher
Earthlead is a free massive multiplayer online browser strategy game.
Raid_Finder