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

Manuskript - Open-source tool for writers.

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

StoryMill - Developers and publishers of Mac, Win, and iOS productivity, home and office and writing software such as MacGourmet, Paperless and many more. Based in MN.

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.

Novelize - Novelize is an online novel writing app designed to keep authors on track.