Write Together - Learn to write, together, one day at a time.

LibreOffice - Writer - Open-source cross-platform word processor.

Kludd.co - Everyone writes.

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.

Typely - A sensitive, unobtrusive and reliable tool for any writer, newspaper editor, teacher, blogger or student STA

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