Wondershare PDFelement - All-in-one PDF editor

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.

PDF-XChange Editor - The smallest, fastest, most feature-rich PDF editor/viewer available

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.

Nitro Pro - An affordable Adobe Acrobat alternative for editing and creating PDF

Foxit Reader - Foxit Reader is a free and light-weight multi-platform PDF document viewer.