Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!
EverNote
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Evernote sounds like a good option for Windows/Mac users.
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Tusk is a desktop client for EverNote.
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NixNote (3rd party cross-platform client for EverNote)
fix the issue note the content is invalid!!! http://appslova.com/could-not-sync-note-the-content-is-invalid-in-ipad-iphone-and-android/
Boostnote
CherryTree
Zim
- Zim is a very good free alternative. You can manually sync notes using Dropbox, TeamDrive, etc.
Zim Plugins for Firefox
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Zim Clip
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Zim Capture
Misc
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KeepNote
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Basket Note Pads
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GeekNote (command-line client for EverNote)
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Out of Milk
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Remember the Milk
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Taskwarrior (the package is named task in Debian)