KeepNotes for Google Keep - The easiest and most convenient way to access Google Keep notes on your Mac
Encrypted Notepad - Encrypted Notepad is a very simple to use application providing state of the art...
GitJournal - Manage your Notes from any Git Repo.
Notebook PEA - Protects your private notes with a password.
Obsidian.md - A second brain, for you, forever. Obsidian is a powerful knowledge base that works on top of a local folder of plain text Markdown files.
Paranoia Text Encryption - Paranoia Text Encryption encrypts text according to a choice of strong algorithms.