Class designer [closed]

Question

What software do you use when designing classes and their relationship, or just pen and paper?

Answer 1

I find pen and paper very useful, and I try to get as far away from a computer as possible. If I do it on the compy, I'm always too tempted to start programming the solution. That inevitably leads to me changing things later that I would have spotted in the planning phase had I actually spent a good measure of time on it.

Answer 2

I usually start with a empty interface then start writing tests. I then generate the members using refactoring tools. For me unit testing is part of the design.