OpenSimulator is a 3D Application Server. It can be used to create a virtual environment (or world) which can be accessed through a variety of clients, on multiple protocols.Can be used to simulate a virtual environment similar to Second Life
The OpenSimulator Project is a BSD Licensed Virtual Worlds Server which can be used for creating and deploying 3D Virtual Environments. It has been developed by several developers. Out of the box, the OpenSimulator can be used to create a Second Life(tm)