UML Designers

Are there any FREE UML designers that can be used for Java?

The fact that BlueJ has a good UML designer (only a partial implementation) is one of the only reasons that i still use BlueJ.

If i could find a good UML designer for Free i'd stop using BlueJ.

BlueJ UML designer:

http://img39.imageshack.us/img39/2117/untitled6tm.jpg

You can check out ArgoUML, or the very simple Violet. Both are free.
I've heard good things about UMLet, but I've never used it.