Black Shoals Stock Market Planetarium - Exhibition that simulates stock market activity as the night sky in a planetarium, with a complex ecology of artificial creatures whose lives are controlled by market dynamics.
GA Playground - General genetic algorithms toolkit implemented in Java, for experimenting with genetic algorithms and handling optimisation problems.
Genetic Ant Algorithm - Applet that implements the algorithm, based upon the model given in Koza, Genetic Programming, MIT Press.
JAGA: Java API for Genetic Algorithms - Java API for implementing any kind of genetic algorithm and genetic programming applications quickly and easily. Includes tutorials and examples.