__TheBrain__, formerly branded __PersonalBrain__, is a mind mapping and personal knowledge base software from TheBrain Technologies - typepad 
It includes the ability to add links to Web pages and files as well as notes and events using a built-in calendar. It is cross-platform, available for Microsoft Windows, Unix and Unix-like operating systems, and Mac OS X. It is available in a free edition as well as in commercial editions with additional features - wikipedia
TheBrain. - wikimedia
# See also