Question. I dream in UML class diagrams. I model in UML class diagrams. Why can't I have an application built right from a UML class diagram?

Answer. Now you can. (Pour on the cheese)

UltraViolet is a UML class editor. Draw pretty UML diagrams easy and fast. And when you are done, you click a few buttons to generate a JMatter application that works. 

Download: umlc-20060829.zip 

Project: http://code.google.com/p/umlc/