TreeSheets

A free form hierarchical information organizer.
The ultimate replacement for spreadsheets, mind mappers, PIMs, text editors and small databases.
Suitable for any kind of data organization, such as Todo lists, calenders, project management, brainstorming, organizing ideas, planning, requirements gathering, presentation of information, etc.
It's like a spreadsheet, immediately familiar, but much more suitable for complex data because it's hierarchical.
It's like a mind mapper, but more organized and compact.
It's like a text editor, but with structure.