StarUML - UML or MDA Platform

StarUML is a software modeling tool to develop fast, flexible, extensible, featureful UML/MDA platform running on Win32 platform. It is a good alternative to Rational Rose. StarUML provides simple and powerful plug-in architecture so anyone can develop plug-in modules in COM-compatible languages.

It supports Use Case Diagram, Class Diagram, Sequence Diagram, Collaboration Diagram, Statechart Diagram, Activity Diagram, Component Diagram, Deployment Diagram, Composite Structure Diagram. The diagram could be exported to MS document. It also supports Gang of Four and EJB patterns.