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.
calibre - Ebook manager, viewer & converter
Cool Reader - Fast and small cross-platform eBook reader for desktops and handheld devices
Google Play Books - Google Play Books lets you search, preview, and buy millions of books using Google Book Search.
iReader - iReader is one of the most accomplished ways to read the books right from your smartphones.
ReadOut - ReadOut is a text to speech conversion app by Flying Phoenix that offers features to enable you to import text from a variety of different sources to convert it into speech in various languages right on your mobile phone.