UPDF - UPDF is a free, unique, productive, and delightful PDF editor for Windows, Mac, iOS, and Android.
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.
calibre - Ebook manager, viewer & converter
Sumatra PDF - Sumatra PDF is a slim PDF/DjVu/EPUB/XPS/CHM/CBR/CBZ/MOBI viewer for Windows.
OverDRIVE - Make workspaces and sites automatically from Google Drive
Wondershare PDFelement - All-in-one PDF editor