OpenSimulator (2) - Open Source Software Project Information: "OpenSimulator is an open source server for hosting virtual worlds similar to Second Life. OpenSimulator uses libsecondlife to handle communication between the client and server, so it is possible to connect to an OpenSim server using the Linden Lab Second Life client.
It can be used to create a Second Life like environment that can be run as a standalone instance, or connect with other OpenSimulator instances. It can also be used to create other 3d interactive or collaborative environments."
