I am looking for a very clean UML Design tool that works for both Windows and Mac. I want it to work for both platforms as I do use windows from time to time but if there was a really good tool that only supported 1 platform it would have to be Mac as that is what I work on most of the time. I also need the price to be reasonable (something that cost 250 dollars is probably out of my price range unless it just has the best features and a ton of them). I am currently using XMind for concepts/brainstorming and I absolutely love the interface/workflow it has so if there is a UML tool with a similar interface/workflow, that would be great. My primary use for this will be outlining code (classes) and outlining the different ways they interact and work together. Like I said I am using XMind for concepts/brainstorming and MySQL Workbench for database design, just need something for high level code design.

I generally use UMLet which is Java based.

I like Visual Paradigm for UML very much.