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.
open-pdf-sign - Sign PDF files digitally from CLI or your webserver
Sumatra PDF - Sumatra PDF is a slim PDF/DjVu/EPUB/XPS/CHM/CBR/CBZ/MOBI viewer for Windows.
TinyWow - TinyWow provides free online conversion, pdf, and other handy tools to help you solve problems of all types.
Wondershare PDFelement - All-in-one PDF editor
MuPDF - MuPDF is a lightweight PDF and XPS viewer.