Breeders is a simulation of artificial life driven by physics and simple rules. It's a sandbox for exploring emergent behaviours, tinkering with ecosystems, and exploring the stress relieving effects of tossing around large numbers of bouncing boxes. :)
I've been spending a lot of time in ZBrush and my favorite fractal program - Mandelbulb 3D. Check out these crazy plants that began their lives as mathematical equations. Grabbed from the fomulas then hand painted in ZBrush.