The Biological Modeling and Visualization group develops a set of related plant modeling software packages collectively called the Virtual Laboratory / L-studio. Versions are available for Windows, Mac OSX, and Linux.

vlab for MacOS 10.5 “Leopard” or later

Installing vlab on MacOS

vlab for Linux

Built and tested under Ubuntu 10.04

Download beta version: vlab 4.4.0-2424 (February 19, 2014) (42Mb)

Installing vlab on Linux

L-studio for Windows XP or later

Download stable versions: (Which version should I choose?)
or download beta versions:
Installing L-studio
You may also want to try TreeSketch, our interactive iPad application for modeling trees:

TreeSketch for iPad

TreeSketch is a fully featured interactive 3D tree modelling application for the iPad. Creating a tree is as simple as painting on the screen while watching the tree grow into your stroke. TreeSketch is powerful enough to capture a stunning variety of tree forms.

Download free from the iTunes App Store
Watch tutorial videos
Read our paper about TreeSketch