SnappyTree
Online browser-based 3D tool to create your own model of a tree, which is fully exportable for common file formats:
SnappyTree is a procedural tree creation app designed to demo webgl and proctree.js. SnappyTree produces proctree.js JSON which can be used to generate trees client side in other web applications/games. In addition, SnappyTree also provides export options for wavefront and collada file formats so the generated trees can be used in other native applications.
You can experiment with this online tool here
(Via prostheticknowledge): link here