calibre - Ebook manager, viewer & converter
Adobe Digital Editions - ebook reader software
Apple Books - The all-new Apple Books has been redesigned to make finding, reading, and listening to books a beautiful, effortless experience on iPhone and iPad.
Calibre Web - Calibre Web is a web app providing a clean interface for browsing, reading and downloading eBooks...
Open Library - The ultimate goal of the Open Library is to make all the published works of humankind available to...
Moon Reader - Innovative book reader with powerful controls & full functions