An Add-on for Blender, which lets you create Lanscapes, with simple erosion, water and forest-distribution simulations and a small programm, that let's you create some neat 2D landscapes with the tinker turtle library.
Both came into existence during my "Maturaarbeit".
To install an Add-On in blender go to file -> user preferences -> Add-ons -> install form file and select the LandscapeAddOn.py file.
Both underly the GPL 3.0. license, whose text should be placed next to this readme.