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HeimerSimpleMind
Free

The open-source software is available without a license fee. Hosting, hardware and…

 Freemium

Free edition available; Pro is a one-time purchase per platform with no subscription.

Windows, Linux Windows, macOS, Android, iOS
  • Supports automatic layouts and image exports.
  • One-time purchase, no subscription
  • Free-form and automatic layouts
  • It is a diagramming tool rather than a full document editor.
  • Pro must be bought separately for each platform
  • Images, styling and notes need the Pro edition
Downloadable app Downloadable app
Open source Closed source
License: GPL-3.0 License not stated
Not stated if an account is needed Not stated if an account is needed
Not stated if it works offline Not stated if it works offline

Checked September 22, 2026

Checked September 24, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.