JaxoDraw: Feynman Diagrams made easy!
Simple and intuitive 2D vector drawing for electronics and not only.
Former project page
Not your usual Architectural Modeler
Advanced script editor IDE for squirrel/pawn/lua and more
Filtered is a tool for editing SVG filters
A powerful C++ class library for image manipulation
The X3DV Module Suite is a free set of Netbeans modules to code in X3D