Blender plugin produced as part of my undergraduate dissertation: Procedural generation of tree models for use in computer graphics.
Thanks to the awesome work of Luke Pflibsen-Jones you can just drop the ch_trees folder into your blender addons folder and enable the plugin in user settings to start generating trees - now with a complete customisation UI!
Download the latest version (for blender 2.8) here. The 2.79 version of the plugin is available here.
(WIP) Docmentation is available on the Wiki.