Add-ons for Blender 2.59
Sapling
Modelling realistic trees can be a difficult task, especially if a large number of similar trees with small variations are required. This addon uses the method developed by Jason Weber and Joseph Penn in their paper "Creation and Rendering of Realistic Trees" to easily create a wide variety of trees. Using curves as the basis of construction allows dynamic geometry which can be changed depending on the level of detail required.
Ivy Gen
Based on the wonderful code by Thomas Luft & his original IvyGen program.
Anyone had a play around with these yet?