LibreOffice - Writer - Open-source cross-platform word processor.
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.
Microsoft Word - Microsoft Word is a commercial word document processor for Windows.
AbiWord - AbiWord is a free software word processor.
Pages - Pages for Mac is a word processor that offers tools needed to create documents.
ONLYOFFICE - ONLYOFFICE is a complete office and productivity suite.