Electric Sheep realizes the collective dream of sleeping computers from all over the internet. Free; Linux, MacOS X.

MacOSX software for simulation of artificial life and decentralized systems.

A list of programs using alife type techniques (English/Japanese).

A web-oriented artificial-life site: Alife, genetic-algorithm and cellular-automata experiments written in cross-platform web languages (Java, tcl/tk), with free source code.

A sourceforge project for an environment for creating and running agent-based models. Tcl/Tk scriptable, cross-platform (Windows and Linux/Unix).

Artificial Life for the Macintosh.

Introduction to artificial life. Each chapter is illustrated by a program or an applet. Chapters are available in PDF.

Exploration of fitness landscapes.

A free artificial life program running under Windows. Similar to C-Robots with a biological bent, where the robots mutate and evolve over time.

Physis is a software platform for testing the evolvability of different assembly-like programming languages.