I dont seem to be able to stop myself picking up iPhone apps here and there. Following from Computation Studio and the generative software like ConceptFreeArt – there is iBonsai. This nice little app generates bonsai trees of various types with generated form.
It isnt amazing, but it is elegant, clever and looks great. The one change I would like to see at the moment is a nice moss-filled pot rather than the see-through one.