breve is a free, open-source software package which makes it easy to build 3D simulations of multi-agent systems and artificial life. Users define the behaviors of agents in a 3D world and observe how they interact. Agents behaviors can be written in Python, or using a simple scripting language called “steve”. breve includes physical simulation and collision detection so you can simulate realistic creatures, and an OpenGL display engine so you can visualize your simulated worlds.
breve is available for Mac OS X, Linux and Windows