calibre - Ebook manager, viewer & converter
Sumatra PDF - Sumatra PDF is a slim PDF/DjVu/EPUB/XPS/CHM/CBR/CBZ/MOBI viewer for Windows.
Calibre Web - Calibre Web is a web app providing a clean interface for browsing, reading and downloading eBooks...
Haihaisoft PDF Reader - Haihaisoft PDF Reader is the name of a free to use PDF reader and printer that is extremely simple to launch.
Moon Reader - Innovative book reader with powerful controls & full functions
eXPert PDF Reader - eXPert PDF Reader is a free to use PDF reader and views for the Windows operating systems.