Let me answer this and hope someone else puts some
more details...
Croquet was the masterpice created by top Smalltalk
programmers and was released as a SDK.
Some of the Croquet pillars put toguethet the
concept of making a 3D world browser and with fund raising from Julian Lombardi
created Open Cobalt hosted at Duke University.
Another spin off from Croquet was Qwaq and shortly
was made into a venture constituting a company named Teleplace that sold
the 3D collaboration model as a end-user software product that improved
quality and evolved Croquet from a sandbox Smalltalk image into a fully
installable COTS.
When Teleplace ceased busineses, the code was
released as OSS and that baseline is available as OpenQwaq.
I was inclined to put my hands around QpenQwaq buy
because of lack of tim I stayed tuned to Open Cobalt.
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