Which are your favorite UML tools?

[Anastasios Hatzis]

Hello,

I'm working on the light-weight MDA tool pyswarm, 
http://pyswarm.sourceforge.net/ (it is about a code-generator for 
Python/PostgreSQL-based software. I plan to add support of UML CASE tools 
other than the one supported currently.

I would like to learn which UML tools you use (if any), preferrably if it 
comes to modeling a Python application. So I'm asking you to tell me the name 
of your favorite UML CASE tool(s).

Please also provide the version of the tool you use (and perhaps also the URL 
of the project/vendor). If this is not of general interest for this list you 
can also reply directly to my email address.

Thank you in advance.

Best regards
Anastasios