Open Source MMORPG Framework
Arianne is an engine to develop multiplayer online games like Stendhal
Source of Mana is a unique 2D MMORPG
An OpenGL client-server game
GameWhizzards is a user created, Open Source 3D MMORPG
Massively multiplayer online game server and client framework
Immersive and expansive hardcore old-school 2D ORPG (MMORPG)
Develop an emulated Darkfall Online Server.
.NET World of Warcraft Server
Open Source Virtual World and MMOG Development Platform
Manage your WOW P-Server from everywhere
Create your own online real-time browser-based MMO in your website
War of Respect is an online turn-based MMORPG in 2D-anime style.
c# game server framework