Alternatives To Second Life « Second Life Games
I’m not sure I’d call all of these competitors to SL, but they each have their strong points. Raph Koster has his own list here.
There are quite a few more in the pipeline that I’m aware of but can’t name. Most don’t allow real object editing — some customization or selection from a catalog. Some try to let you pick objects from the web itself. I haven’t seen any that truly solve the problems I addressed in my recent "Anti-Social Worlds" post.
And now, I have to get back to work. I just wasted 2 hours posting to the OpenGL boards about how the new object-oriented API should actually support C++ directly instead of being so C-like, as the current versions are…