calibre - Ebook manager, viewer & converter
Universal Book Reader - Just like its name, Universal Book Reader is really a universal book reading application allowing you to read the eBooks from the convenience of your smartphones.
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.
Cool Reader - Fast and small cross-platform eBook reader for desktops and handheld devices
Open Library - The ultimate goal of the Open Library is to make all the published works of humankind available to...
iReader - iReader is one of the most accomplished ways to read the books right from your smartphones.