So I've got to produce a full set of UML diagrams for a chess game I have to write.

Is OmniGraffle the best option?

It seems pretty good, but what are the alternatives?

TIA.

Rational Suite / Rational Rose is the industry standard.

But you pay for what you get, I think the suite costs about 10K per workstation.

If you are a student, the Uni can get it for free for non-commercial use (it is what we used when I gave my project seminar at Augsburg Uni). It is written in Java and runs under Eclipse, so it is platform independent.

The uni used to tell us to use Omondo as it would plug into Eclipse, but apparently you have to pay for that now...I'm not sure what they recommend for us to get now...

I've heard (but never looked to see) that XCode does some UML modelling...

*runs and hides from UML, disgusting thing!*

I've learned that OmniGraffle can produce UML if you feed it code.

I think I might cheat and do it backwards!

I remember another tool one of my lecturers told me about in second year, JDeveloper. He said it was biased towards UML for Oracle databases, but that it should work for programming. I think I tried it once then gave up as I had no idea how to form proper UML...