treesheets - 1:1.0.2-1.1 main

Suitable for any kind of data organization, such as Todo lists, calendars,
project management, brainstorming, organizing ideas, planning, requirements
gathering, presentation of information, etc.
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It shares many characteristics with more familiar tools, and augments their
abilities - like a spreadsheet, but supporting hierarchical data; like a mind
mapper, but more organized and compact; like an outliner, but in more than one
dimension; and like a text editor, but with structure.