Origami Editor 3D is an advanced paper folding simulator. It uses a what-you-see-is-what-you-get interface and operates with a geometric abstraction of the Yoshizawa-Randlett system. Anything from a simple airplane to John Montroll's omega star can be folded in this editor.
Origami files created with the program preserve the entire folding process, and they can be exported as folding diagrams in PDF, animated GIF files, or even as standalone Java programs displaying the origami in a 3D...
TreeGen consists in a platform indipendent Python script which should work as a plugin for Blender. Thanks to the graphical interface, it aims to create random trees and forests in a simple and alternative way to L-System.
P4D is a lowpolygon 3D editor and a game environment.
With the editor you can modify bonebased 3D models, animations and textures.
The game environment (which is also used by the editor) provides simplescript-, physic-, particle- engines.