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Diagram DesignerSimpleDiagrams
Free

Freeware with source code under the MIT licence.

 Paid

The website offers a seven-day trial; the Mac App Store edition is paid up front.

Windows macOS
  • Small 2 MB installer
  • Template palettes for flowcharts and UML
  • Hand-drawn shape libraries cover several domains
  • Native Mac desktop interface
  • Windows only
  • Dated interface and simple feature set
  • Desktop app is available for Mac
Downloadable app Downloadable app
Open source Closed source
License: MIT License not stated
No account needed Not stated if an account is needed
Works offline Not stated if it works offline

Checked October 2, 2026

Checked October 8, 2026

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