12 x 3D TOOLS FOR EDUCATION
For those who want to start simply and have fun or for those interested in high-end simulated learning environments. A mix of free, open source and commercial tools:
8. Open Sim -OpenSim is an open source 3D application Serve that can be used to create a virtual environment (or world) which can be accessed through a variety of clients, on multiple protocols. Out of the box, OpenSimulator can be used to simulate a virtual environment similar to Second Life™ (including client compatibility).
11. Project Wonderland -Open source toolkit for virtual 3D worlds. The types of collaborations that can happen within the space include audio communication, live desktop applications of all kinds, and eventually collaborative creation of world content (both graphical and procedural).