SPUG: What tool do you use to graphically document class relationships?

[Michael R. Wolf]

I'd like to create some class diagrams.  It's a lightweight architecture, but it's a bit bigger than paper/pencil.  I don't need a huge IDE, or design tool.  I just a drawing tool that will convey a coarse set of relationships between classes.

What can you recommend (or anti-recommend)?

-- 
Michael R. Wolf
    All mammals learn by playing!
        MichaelRWolf at att.net