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.
calibre - Ebook manager, viewer & converter
AlReader - Alreader.com - new perspective on reading e-books.
FBReader - FBReader is an e-book reader for various platforms. Features:
Freebook Sifter - Freebook Sifter lists free eBooks from various sources.
Google Play Books - Google Play Books lets you search, preview, and buy millions of books using Google Book Search.