Adobe Reader XI The legacy free PDF reader from Adobe featuring cloud sharing, a few minor editing features, form compatibility and the option to print portable documents.
WinDjView Provides the ability to view DjVU files, an alternative to PDF, with a few options to export pages, convert them and rotate/zoom.
Adobe Acrobat Reader DC A free Adobe download for its PDF reader with several PDF functions, mainly to read, print, export, merge, comment, fill and sign documents.