Dropbox Paper - A collaborative document-editing service

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.

Adobe Acrobat DC - Make your job easier with Adobe Acrobat DC, the trusted PDF creator. Use Acrobat to convert, edit and sign PDF files at your desk or on the go.

Wondershare PDFelement - All-in-one PDF editor

Quip - Quip is the modern productivity suite that simplifies your life and helps your team get work done faster.

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