JBox2D is a close Java port of Erin Catto's excellent C++ Box2D physics engine. Check out the demos below to see some examples of what it can do.
XRVG stands for "eXtended Ruby Vector Graphics". The purpose of this project is to define and implement a high-level and powerful programming environment for vector graphics generation.
like procesing, etc
UMLet is an open-source UML tool with a simple user interface: draw UML diagrams fast, export diagrams to eps, pdf, jpg, svg, and clipboard, share diagrams using Eclipse, and create new, custom UML elements.