Eric Weisstein's Treasure Trove of the Life Cellular Automata. You know, Conway's Game of Life. See also Eric's Treasure Troves of Science and Eric's Excruciatingly Detailed Star Trek (TOS) Plot Summaries.

Do any of these look familiar? Yes indeed, as Eric Weisstein is the same quality Internet author and archivist that runs MathWorld. I wish I had the time to make sites like Eric's-- indeed, this is the kind of thing I'd do if I were rich enough to retire early, at least for the first couple of years.