What Else ?

VR dedicated package that will explore networking ?

WorldToolkit by Sens8
"WorldToolkit is the leading cross-platform real-time 3D development tool."
(World2World, the Client-Server... WorldUp)

Virtools worldtoolkit

OpenMASK (Modular Animation and Simulation Kit) is a platform for the development and execution of modular applications in the fields of animation, simulation and virtual reality.

VR Juggler - Open Source Virtual Reality Tools

Tiwi : only for the Wedge...