Source of Mana is a unique 2D MMORPG
Collection of Tools for Perfect World MMORPG
Provides a full suite of clients and servers for virtual worlds.
This is the UI I use to play World of Warcraft
Collection of Tools for Blade & Soul MMORPG
An Open Engine for use on the OUYA
The home for Ihm's FFXI Tools, including Mappy.
Open Source Virtual World and MMOG Development Platform
Archangel provides tools to manage Angels Online gameplay.