I have perpetrated what I intend to call the S.C.A.M.P, or the Symbian Cellular Automata Machine in Python. (Y'know, Conway's Life and all that...) Mostly, you can just press a button and something interesting ot aesthetic happens. However, it can also be as involved as you like,
you can enter logical expressions and make up your own CA rules. It's got plenty of docs, and you can access them as an integrated help system on your 'phone's browser. It works fine on 3rd and 5th edition, but it creaks very slightly on Symbian^3. (Help system and progess bars don't work, and the canvas doesn't quite fill the screen. I wonder if someone can help me out...) Here's one of the myriad things it does:
You can grab it as a script or .sis if you don't have Python here: http://tinyurl.com/SCAMPhome
It's open-source, (well, how could it not be?) and if it amuses anyone I'd love to hear about it.
Have Fun,
Giles.