A graphical Finite State Machine (FSM) designer.
Free drawing software for Windows, Mac OS X, and Linux
GUI to combine photos to get deeper DOF or HDR.
Hand Written Equation Creator
Not your usual Architectural Modeler
dedalo is a 2d cad drawing software written in python3.
Inkscape extension to add and edit GNUplot graphs
A Blender 2.6+ addon that aims to implement Motion Graphs
IDE for creating interactive Flash and HTML5 content