MindManager

probably the market leader in Mind Mapping software.

http://www.mindjet.com

Gyronix Result Manager helps turn mindmaps into group action lists, and track completeness. (Following David Allen's Getting Things Done model) http://www.gyronix.com/resultmanager.php

• review http://blogs.officezealot.com/marc/archive/2004/08/25/2356.aspx

• Chuck Frey review http://www.innovationtools.com/Tools/SoftwareDetails.asp?a=154