Mind mapping on your Mac. Expands beyond the canvas (for bigger brains?). Works with QuickLook, Spotlight, and iChat Theater (Intel Macs only). MindNode Pro adds Reconnecting, Folding, Link Support, and other goodies.
MindNode is a free and very easy to use mindmapping application. It was created with the user in mind and features a very simple interface for quickly creating visual appealing mind maps.
9WR – MindNode: Intuitive mind mapper with easy node creation, keyboard support.