ComputerAnts:

ComputerAnts is a free Windows program that teaches principles of GENETIC ALGORITHMs by breeding a colony of ants on your computer screen. Users create ants, food, poison, and set CROSSOVER and MUTATION rates. Then they watch the colony slowly evolve. Includes extensive on-line help and tutorials on genetic algorithms. For further information or to download, see http://www.axcelis.com