extensible simulator, http://www.spiderland.org/breve/

Framsticks “is a three-dimensional life simulation project. Both physical structures ('bodies') and control systems ('brains') of creatures are modeled. It is possible to design various kinds of experiments, including simple optimization (by evolutionary algorithms), coevolution, open-ended and spontaneous evolution, distinct gene pools and populations, diverse genotype/phenotype mappings, and species/ecosystems modeling.” http://www.frams.poznan.pl/

GOLEM (Genetically Organized Lifelike Electro Mechanics) involves a set of experiments in which simple electro-mechanical systems evolved from scratch to yield physical locomoting machines. http://demo.cs.brandeis.edu/golem/

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