KeepNotes for Google Keep - The easiest and most convenient way to access Google Keep notes on your Mac
Google Keep - Capture notes, share them with others, and access them from your computer, phone or tablet. Free with a Google account.
GitJournal - Manage your Notes from any Git Repo.
Joplin - Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks. The notes are searchable, tagged and modified either from the applications directly or from your own text editor.
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.
Standard Notes - A safe place for your notes, thoughts, and life's work