Tree Sheets
TreeSheets organizes information in a hierarchical spreadsheet format for tasks, mind maps, outlines, and small databases.
About Tree Sheets
TreeSheets is an open source free-form data organizer built as a hierarchical spreadsheet. It works as a replacement for spreadsheets, mind mappers, outliners, PIMs, text editors and small databases for tasks like todo lists, calendars, project management, brainstorming and planning. Downloads are provided through GitHub releases for Windows, OS X and Linux, and it can stay in the system tray with multiple documents loaded.
Key features
- Organize data in a hierarchical spreadsheet layout
- Replace spreadsheets, mind mappers, outliners, PIMs and text editors
- Manage todo lists, calendars and project management
- Handle brainstorming, planning and requirements gathering
- Download via GitHub releases for Windows, OS X and Linux
- Stay in the system tray with multiple documents loaded
Best for: Anyone organizing todo lists, calendars, projects, ideas and small databases in a hierarchical sheet
Tree Sheets at a glance
- Website
- strlen.com/treesheets
- Category
- Software & Utilities › Text Editors
- Type
- App
- Pricing
- Free
- Platforms
- Windows, macOS, Linux
- Details verified
- Oct 22, 2026 · Official source
- Open source
- Yes · Source code
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
Guides for Text Editors
Tree Sheets alternatives
Tools and sites you could use instead, ranked by how closely they match.
Mindomo supports collaborative mind maps, concept maps, outlines, and Gantt charts, with web and desktop apps.
LibreOffice is a free, open-source office suite for Windows, macOS and Linux, with tools for documents, spreadsheets, presentations, drawings, databases and formulas.
FreeOpen source
VYM creates tree-structured mind maps and includes a personal task manager.
Create mind maps, diagrams, and notes with Heimer, a desktop tool targeting Linux and Windows.
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24 alternatives
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Proton Sheets provides encrypted online spreadsheets for organizing data and collaborating, with Excel and Google Sheets import.
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