Metanota is described as 'beautiful OSX client and editor for creating and managing notes using the well known SimpleNote cloud service. Other note-taking cloud providers will follow shortly' and is a Note-taking App in the Office & Productivity category. There are more than 50 alternatives to Metanota for a variety of platforms, including Windows, Android, Mac, iPhone and Online / Web-based. The best alternative is Joplin. It's not free, so if you're looking for a free alternative, you could try Standard Notes or Evernote. Other great apps like Metanota are Simplenote (Free, Open Source), CherryTree (Free, Open Source), Trilium Notes (Free, Open Source) and Cryptee (Freemium, Open Source).
Publicnote is a super-simple, free, public notepad. Enter any title to access a note. No account required. Every note is public. You are free to modify any note you find. Every note is encrypted. You must know the title to see the note.
Bananote is a fast loading, no nonsense, easy to use note taking app. Quickly add notes in just a few taps. Edit or delete unwanted notes with just a swipe. Lock your private notes with a password or mark important items with an indicator.
Memo is a beautiful history-based notes app built with iOS design guidelines in mind. Additions and deletions are automatically stored in the history timeline, which can be scrubbed to travel forwards and backwards in time through the note.
Stample is a knowledge network that allows you to deliver the right information at the right time, to your partners and clients. Stample helps teams to aggregate and share knowledge, increase your productivity, and helps you to generate new revenues.