MV3D is an open source virtual world simulation framework written in Python. It was designed with scalability in mind and aims to be able to distribute a world across as many servers as needed while dynamically balancing the load.
All Ahead Flank! (AAF) simulates modern tactical naval combat in real time, including surface, subsurface, and air threats. Multiple factions and players are supported, and the perspective is that of a flag officer in command of a group of assets.