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WhispSideNotes
Free

Free and open source under the GPL 3.0 or later.

 Paid

Commercial Mac app from Apptorium; check the developer's site for current pricing.

Linux macOS
  • Start typing immediately with no files or titles to manage
  • Text expansion and automatic checklists
  • Notes panel appears at the screen edge without app switching
  • Markdown, tasks, images and colors in notes
  • Built for GNOME on Linux only
  • Not meant for organising a large note collection
  • Mac only
  • Suited to quick notes rather than a large knowledge base
Downloadable app Downloadable app
Open source Closed source
License: GPL-3.0-or-later 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 October 1, 2026

Checked September 24, 2026

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