L-systems
I wrote an L-systems implementation in Common Lisp as part of a thesis around 2002. The software, thesis and some raytraced images are still available at my old university home page: <a href="http://www.ii.uib.no/~knute/lsystems/llisp.html" rel="nofollow">http://www.ii.uib.no/~knute/lsystems/llisp.html</a><p>If anyone plans to test the software: I haven't run it in ages, and I suspect that the OpenGL bindings will be tricky to get working today. The rest of the code hopefully still works.