PiratePad VS LibreOffice - Writer

CryptPad - CryptPad is a collaborative office suite that is end-to-end encrypted and open-source.

Microsoft Word - Microsoft Word is a commercial word document processor for Windows.

Firepad - Open source collaborative code and text editing that relies on Firebase for real-time data...

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.

eduPad - Real-time collaborative text-editor. No account required. Edits highlighted in authors color.

AbiWord - AbiWord is a free software word processor.