FreeMind – free mind mapping software

FreeMind is a Java-based, cross-platform mind mapping software.

“A mind map is a diagram used to represent words, ideas, tasks, or other items linked to and arranged around a central key word or idea. Mind maps are used to generate, visualize, structure, and classify ideas, and as an aid to studying and organizing information, solving problems, making decisions, and writing.” – Wikipedia

Download: http://freemind.sourceforge.net