XMUD is a MMORPG implementation in Java. Players can extend the system by creating new objects. The game provides a 3D engine written in Java3D, Persistent state management, synchronization and networking subsystems. Compatible with NWN modules.
JabaMud is an attempt to build a Java based multiuser reality. The goal is a graphically stunning massively multiplayer RPG that is completely OS independent and relatively quick. JabaMud runs as an application and uses Java3D to render scenes.