AlReader - Alreader.com - new perspective on reading e-books.
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.
FBReader - FBReader is an e-book reader for various platforms. Features:
iReader - iReader is one of the most accomplished ways to read the books right from your smartphones.
Google Play Books - Google Play Books lets you search, preview, and buy millions of books using Google Book Search.