Blebs!

Check out the menagerie on Golan Levin's page. A few of his applets and flash widgets haven't aged well (the novelty is gone) or don't work (at least on my installation). Several of them, though, still have the "gee whiz" appeal so important to the milieu he works in; even a decade after being made, like Blebs and his portraits grown from Voronoi diagrams (both pictured below). I think it has to do with modeling the mathematics of the natural world. (Yep, definitely something like that.)

Link to Blebs.
Link to Voronoi portraits.
Link to Golan Levin's page.