Google Docs - Create a new document and edit with others at the same time -- from your computer, phone or tablet. Get stuff done with or without an internet connection. Use Docs to edit Word files. Free from Google.
Ghostnote - Add notes to anything.
Bit.ai - Bit is a smart real-time document collaboration platform for teams to create interactive documents, manage digital content and track document insights.
Box Notes - Box Notes: take meeting notes, share status updates and plan projects together instantly. Online, across devices.
Airborn - Create and edit documents online without sacrificing your privacy
Somnote - More often than not, note-taking is a pressing, off the cuff movement that requests a quick and productive approach.