Omondo EclipseUML is a visual modeling tool, a EclipseUmlPlugin which natively integrates with Eclipse and CVS.

You can generate code from  your model, or generate a model from your code. Very nice. Go to http://www.omondo.de. 
A free of charge version is only available for Eclipse 2.x

The full version has lots of nice features, but is very expensive (around 2000 Euros).
See http://www.omondo.de/

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FYI, their installer is terrible.
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--NorganHan (reediting)
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CategoryUml