Virtual+Worlds

Virtual Worlds Review - Virtual World List by Category http://www.virtualworldsreview.com/info/categories.shtml

Virtual Worlds Timeline http://www.dipity.com/xantherus/Virtual_Worlds

HorizonProject: Virtual Worlds http://horizonproject.wikispaces.com/Virtual+Worlds

SecondLife []

OpenSimulator []

OpenCobalt [|http://www.duke.edu/~julian/Cobalt/Home.html]

Wonderland []

ActiveWorlds []

EduSim []