Artificial Life Can computers think? Well, not yet, but here are a few folks that are working on making that happen:

20Q.net - this is an online project to create a neural-net on the net. Contributors -- that is you -- participate by helping to train the program to recognize objects already in its database, or to add new objects to its database.

Conway's Life - here's an example of evolution in the computer, using a cellular automata simulation.

Bitozoa 2 - another evolution simulation.

Cafun - a set of Java applets that allows the simulation of complex systems.

Mbiti World - here's another simulation of evolution.

Boppers - a simulation program that was included in an artificial life book from the 90s. The book is posted online as well.

Planet Wator - another artificial life simulator.