I used mind-mappers, until I got frustrated with their scalability, density, and performance. Then I wrote my own: http://strlen.com/treesheets/ http://strlen.c

I used mind-mappers, until I got frustrated with their scalability, density, and performance. Then I wrote my own: http://strlen.com/treesheets/ http://strlen.com/treesheets/ (which is more of a "hierarchical spreadsheet" than a mind-mapper, but was designed specifically for my personal knowledge base :)