Are there any Ajax-based UML modeling tools?

Question

I'm looking for something like WWW SQL Designer for UML Modeling.

Answer 1

http://www.umlcanvas.org/ (no longer online)

edit: https://github.com/christophevg/UmlCanvas

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Answer 2

This one is not in Ajax, it's in flash, at least it is online: http://www.gskinner.com/gmodeler/launch.html

Answer 3

http://www.websequencediagrams.com/

Sequence diagrams are UML too.

Answer 4

Not totally UML but it's super user-friendly and automatically generates an AJAX application prototype based on your model. it saves us a lot of time. http://www.xifactory.com