Existing Known Collaborative Virtual Environments

Books and Papers

Collaborative Virtual Environments, edited by Churchhill, Snowdon, and Munro
Networked Virtual Environments, by Singhal and Zyda (nice material on dead reckoning and other network-centric technical issues)
Proceedings of ACM CVE Conferences (2002 and ...).
ECSCW95 Workshop Notes
Networked Virtual Environments for Collaborative Learning, by Yam San Chee (2001)
READTHIS Event Traffic study from vol 13. no. 3 of the MIT journal PRESENCE. A Study of Event Traffic During the Shared Manipulation of Objects Within a Collaborative Virtual Environment, by Robin Wolff, David Roberts, and Oliver Otto. Presence 3:13, June 2004, pp 251-262.
Harrison and Dourish wrote a paper on "Place" in CVEs
Gomes et al have written about integrating CVE with other collaborative tools
Subjective Views for CVEs
CVE's in distance education

Organizations

MOVES Institute at NPS, puts all their theses on-line (very cool)
Center for Virtual Environments, University of Salford, developers of VETS
Virtual Environments Group, Georgia Tech, including firefighter simulation
HIT Lab at UW
MCR Lab at U of Ottawa
- A CVE based on VRML97

Platforms and Tools

Virtual Open Mask
DIVE, a major research CVE
Planeshift, an open source game-oriented CVE, C/C++, pretty cool, nice graphics but slow
Wally, a gamer's texture editor
EVE-II an educatioal CVE platform
C'Nedra, an opensource CVE platform
Interreality, an opensource CVE platform based on VOS (Virtual Object System).
MEME
DIVERSE (technical paper)
JAPE
Delta3D open source engine
Metaverse open source engine
Irrlicht open source engine

Web-based CVE's

If it runs in a web browser, it belongs in this category.

Webtalk

Educational CVEs

VIRART
NetICE is a cool virtual conference environment, with shared whiteboards.
- W. H. Leung and T. Chen, "A Multi-User 3-D Virtual Environment with Interactive Collaboration and Shared Whiteboard Technologies", Journal of Multimedia Tools and Applications, Special Issue on Distributed Multimedia Systems for Virtual Society, Vol. 20, No. 1, pp.7-23, May 2003.
- Belle Tseng, Zon-Yin Shae, Wing Ho Leung and Tsuhan Chen, Immersive Whiteboards in a Networked Collaborative Environment, IEEE Intl. Conf. on Multimedia and Expo., Tokyo, August 2001.
- Wing Ho Leung and Tsuhan Chen, "Creating a Multiuser 3-D Virtual Environment", IEEE Signal Processing Magazine, May 2001.
- W. H. Leung, K. Goudeaux, S. Panichpapiboon, S.-B. Wang and T. Chen, "Networked Intelligent Collaborative Environment (NetICE)", IEEE Intl. Conf. on Multimedia and Expo., New York, July 2000
- W. H. Leung, B. L. Tseng, Z.-Y. Shae, F. Hendriks and T. Chen, "Realistic Video Avatar", IEEE Intl. Conf. on Multimedia and Expo., New York, July 2000
- W. H. Leung and T. Chen, "Networked Collaborative Environment with animated 3D avatar", IEEE Workshop on Multimedia Signal Processing, Los Angeles, California, Dec 1998
Maverick is a well-known VR/CVE system from the UK.
COVEN, which uses DIVE
Croquet is a system being developed by folks at the Universities of Wisconsin and Minnesota. They are using Squeak, a modern dialect of SmallTalk.
VASE_3 - mostly for learning but their demo shows a wide variety of applications. They have demos for windows.
Socialized Collaborative Learning in MM Virtual Worlds, built using Vroom and VirtUOUS.
Blue-C - this is a VR project, not a CVE project, cool because it maps camera-captured video of humans into the VR in real-time (very special hardware required)
INVITE provides a distributed/collaborative e-learning environment
SEGWorld, Sarah Drummond, Cornelia Boldyreff, U. of Durham, SEET 2000.

Social CVE's

Planet Virtuel
DigitalSpace Traveler
Activeworlds
Outerworlds
There
Secondlife
Cybertown, a CVE
Worlds.com, aka Worlds.net
3D Chat World, an apparently sleazy 3D MOO
The Palace, an old mostly 2D system

Horror CVE's

Hanson World

Domain-Specific CVE's

These are CVE's for specific professional or academic domains, such as urban planning, or history.

VENUE
Collaborative Virtual Workspace is a CSCW tool for collaborating employees that uses a "rooms" metaphor and doesn't require 3D.
MASSIVE-3
eRena, Electronic virtual worlds for culture, performance, arts and entertainment. They want to bring people's artistic capabilities online. See also.