Dzine is an opensource UML modelling tool. Recently there has been a boom in the requirement for a modelling tool for UML because of the IBM tgmc contest. Even i was in a need for good tool. So thought i would upload this simple, easy to learn software.
This software could be used to design almost every UML model and is very simple!! Try it out yourself. But personally i felt the diagrams produces out of this lacked the necessary looks.