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OmniGraffleDiagram Designer
Paid

Paid app with a free 14-day trial.

 Free

Freeware with source code under the MIT licence.

macOS, iOS Windows
  • Covers diagramming, rapid prototyping and vector design in one app
  • Precise snapping, grouping and alignment tools
  • Small 2 MB installer
  • Template palettes for flowcharts and UML
  • Apple platforms only
  • Paid after the 14-day trial
  • Windows only
  • Dated interface and simple feature set
Downloadable app Downloadable app
Closed source Open source
License not stated License: MIT
Not stated if an account is needed No account needed
Not stated if it works offline Works offline

Checked October 1, 2026

Checked October 2, 2026

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