This an open SVN for the Ascent Emu were people can take it for free. From here you can download the World Fast Developing WoW Emu
Artificial-life and robotics development environment and simulator involving neural networks, 3D physics, vision, and evolutionary programming.
Eternity is a open source galaxy simulation. Features include realistic physics, extensive user interactivity and interoperability with external services such as the internet. Star locations are accurate to real life. Visit http://projecteternity.net