Does anyone know of any software that could be described as "problem-documentation"/"problem-specification". Ideally I'd like something that I could define a problem, break it down into sub problems, attach references/partial-solutions, connect related subproblems etc.
Maybe this is a bit *too* simple, but it's easy to overlook what you can do with pen and paper. The obvious downside is that you can't share it with a team quite so easily.