Scrivener - Scrivener is a content-generation tool for composing and structuring documents.

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.

Manuskript - Open-source tool for writers.

Bit.ai - Bit is a smart real-time document collaboration platform for teams to create interactive documents, manage digital content and track document insights.

Novlr - Online word processor and organizer for novel writing.

Airborn - Create and edit documents online without sacrificing your privacy