I couldn't find a note-taking app that ticked all the boxes I'm interested in: notes are written and rendered in GitHub Flavored Markdown, no WYSIWYG, no proprietary formats, I can run a search & replace across all notes, notes support attachments, the app isn't bloated, the app has a pretty interface, tags are indefinitely nestable and can import Evernote notes (because that's what I was using before).
So I built my own.
Part of this comparison is personal opinion: you may disagree on the UI front, things I consider bloat may be considered features by somebody else etc. but hopefully this comparison did a good job at illustrating the main differences.
Notable also gives you a very powerful Markdown…
This is a very slick looking product for taking notes in markdown instead of wysiwyg, plaintext, etc. Open source, promising project.
Of course, built with Electron. This will be a turn off for some.