Umbrello UML sounds like a good tool

I found this tool under sf.net and i think maybe can help me do what i want here at my job.

This the feature list:
Umbrello UML Modeller Features: "Alpha: Umbrello 1.4 (KDE 3.4, Spring 2005)

If you want a feature added, checks the beastie database and add a wishlist if it isn't already there. All code contributions welcome.

Planned features include:

* XMI standard compliance
* Move canvas items using the keyboard
* PHP 5 code generator
* Fixed many issues in Perl code generator
* Sequence diagrams can now create objects
* Notes are editable directly
* Tabbed diagrams
* Entity Relationship diagrams

Umbrello 1.3.2 (KDE 3.3.2, December 2004)

* Not much difference, most work happening in HEAD

....