calibre - Ebook manager, viewer & converter
Quickreader - Quickreader is a book reading application for the leading smartphones that is combining the solution of two main issues of the book readers namely book reader and availability of books from the leading publication houses.
FBReader - FBReader is an e-book reader for various platforms. Features:
AlReader - Alreader.com - new perspective on reading e-books.
Google Play Books - Google Play Books lets you search, preview, and buy millions of books using Google Book Search.
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.