Sirikata : BSD-licensed platform for virtual worlds

Sirikata is an BSD licensed open source platform for virtual worlds. The aim is to provide a set of libraries and protocols which can be used to deploy a virtual world, as well as fully featured sample implementations of services for hosting and deploying these worlds. The team is aiming for an alpha release in Q2 2009 and this video teaser should give us some sense of what to expect.

Exciting stuff.