MVIP is the multicast VRML interchange protocol. This protocol allows users to participate in shared virtual worlds. The protocol uses the services of RTP and accesses VRML through EAI.
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.