Adobe Reader - Adobe Acrobat Reader is a free tool for viewing documents that have been stored in Adobe's Portable Document Format (PDF).
Nitro Pro - An affordable Adobe Acrobat alternative for editing and creating PDF
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.
CutePDF - CutePDF is a simple but entirely powerful PDF files creator, converter, and virtual printer.
PDF-XChange Editor - The smallest, fastest, most feature-rich PDF editor/viewer available
MuPDF - MuPDF is a lightweight PDF and XPS viewer.