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.
PDFTK Builder - PDFTK Builder is a free graphical interface to for PDFTK, making it much easier to use.
Wondershare PDFelement - All-in-one PDF editor
PDFTools by SheelApps - PDFTools
Foxit Reader - Foxit Reader is a free and light-weight multi-platform PDF document viewer.
PyPDF2 - PyPDF2 - A utility to read and write pdfs with Python