Designed for people of all ages, the FishTank offers firsthand experiences in creating artificial life forms and reveals how simple behavioral rules can produce complex and surprising results. http://www.virtualfishtank.com/
Lotus Artificial Life's Java cellular automata substrate capable of supporting evolving, self-reproducing organisms which are capable of universal computation. http://www.alife.co.uk/hal/index.html
Echo is a simulation tool developed to investigate mechanisms which regulate diversity and information-processing in systems comprised of many interacting adaptive agents, or complex adaptive systems (CAS). http://www.santafe.edu/projects/echo/
Modeling software, theory, and applications. Instream flow model for trout. Salmon out-migration survival simulator. http://www.humboldt.edu/~ecomodel/
Source of information, technical report, and source code for the PolyWorld computational ecology, maintained by Larry Yaeger, PolyWorld's author. (This site contains more up to date links and information than the PolyWorld page at the Santa Fe Institute s http://www.beanblossom.in.us/larryy/PolyWorld.html