calibre - Ebook manager, viewer & converter
Foliate - A simple and modern eBook viewer.
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.
Amazon Kindle - Amazon Kindle software lets you read ebooks on your Kindle, iPhone, iPad, PC, Mac, BlackBerry, and...
Open Library - The ultimate goal of the Open Library is to make all the published works of humankind available to...
Calibre Web - Calibre Web is a web app providing a clean interface for browsing, reading and downloading eBooks...