The UML modeler is a powerful new tool, especially when it's backed with a code-generation system.

The UML modeler is built on top of the Domain-Specific Language (DSL) Toolkit, so you'll need to download and install the Visual Studio 2010 SDK and the Visual Studio 2010 Visualization and Modeling ...

UML is available from a number of vendors, and the open-source Eclipse project supports UML with its Model Development Tools (MDT). Most of these model-based tools can be used to generate code ...