Arbaro - tree generation for povray - can also generate .obj files. Could be quite useful for me, because I always need my own plant textures from time to time (and I can have them rendered by povray)
Archive 15. December 2008
AUST TOMTREE - PovRay Macro Package for Trees (required by Pov-Tree)
MacMegaPov Index - good mac version of PovRay with small GUI for the parameters.
POV-Ray: Documentation - together with Arbaro, this gives me really nice trees and bushes!
POV-Tree - another tree generator. Free as in free beer. Also in Java. More focused on pure trees with fixed presets, not as algorithmically oriented as the previous one.
SuperColdMilk - tons of ac3d plugins.