Croquet : Virtual Worlds Platform

http://youtube.com/watch?v=oKi-fkyAtg8
Croquet Software Demo Movie (August 2007)
This is an edited screen capture from a Croquet demo given by Julian Lombardi in August 2007. It shows some of the capabilities of the open source Croquet software development environment. Croquet is designed for use in creating and deploying large-scale distributed multi-user virtual 3D applications and metaverses.
The Croquet architecture supports synchronous communication, collaboration, resource sharing and computation among large numbers of users on multiple platforms and multiple devices.
www.opencroquet.org