There are many mind mapping tools available to use, and MindMaple is new to me. There is a light version available at no cost, or you can spend $9.99 per year for the professional.
Why use mind maps? It "allows users to represent abstract ideas in a concrete, visible way that encourages conceptual thinking."
This post shows 3 mind maps, all of which are from the lite version. They are also running a contest through June 27, 2012. Create "the most creative mind map with MindMaple" and win a $250 Amazon.com gift card.