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SideNotesWhisp
Paid

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

 Free

Free and open source under the GPL 3.0 or later.

macOS Linux
  • Notes panel appears at the screen edge without app switching
  • Markdown, tasks, images and colors in notes
  • Start typing immediately with no files or titles to manage
  • Text expansion and automatic checklists
  • Mac only
  • Suited to quick notes rather than a large knowledge base
  • Built for GNOME on Linux only
  • Not meant for organising a large note collection
Downloadable app Downloadable app
Closed source Open source
License not stated License: GPL-3.0-or-later
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 24, 2026

Checked October 1, 2026

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