TreeSheets

TreeSheets is a free, open-source data organizer that harnesses the power of hierarchical tables. Hierarchical tables serve as an excellent alternative to spreadsheets, mind maps, outliners, PIMs, text editors, and small databases.

Suitable for any form of data organization, such as to-do lists, calendars, project management, brainstorming, organizing thoughts, planning, gathering requirements, presenting information, etc.

It’s like a spreadsheet—familiar at first glance, but thanks to its hierarchical structure, much better suited for working with complex data.

It’s like a mind-mapping tool, but clearer and more compact.

It’s like an outline tool, but in more than one dimension.

It’s like a text editor, but with structure.