Rule 110 Tiles
I've created a tile set that emulates a rule 110 cellular automaton. Since rule 110 can act as a universal computer, so can my tiles :-) (see the link for more details on this.) You can buy magnetic paper for inkjet printers at most computer stores, which I did so that I was able to print out the tiles, cut them out, and arrange them on my refrigerator. Here are some images of the tiles emulating rule 110:
If you want to download the tile set yourself, here is a link to the vector graphics file. I recommend opening it with a vector graphics program like Inkscape before printing. Also, with Inkscape, you can mess around with the tiles on your computer as well.