DENIM is tool for web designers turns drawing input to basic interface elements and navigation.

Drawing with mouse is not as easy as drawing on a paper but, your drawing input immediately turns into reusable links, windows and checkboxes. It allows design at different refinement levels, and unifies the evels through zooming.

I won’t compare this tool with Mind Manager becouse it is very formal and can be used conjuction with DENIM.
The big defference from a web designer perspective is DENIM is very close to paper and pen, so human :)
This reminds me my sketch board