Download of avida-2.8.1-src.tar.gz (avida-2.8.1-src.tar.gz ( external link: SF.net): 1,609,168 bytes) will begin shortly. If not so, click link on the left.
In Avida, evolution acts on populations of self-replicating computer programs. These "digital organisms" experience natural selection through random mutations and resource competition. See the project website for more information and bug tracking.