Aldiko vs FBReader
Aldiko Book Reader application is a central place for you to read, shop and organize eBooks. Use it to browse and download from thousands of FREE classics and modern works and read them right on your Android Smartphones and tablets. Forget about carrying around heavy stack of books, your whole library is with you all the time.
FBReader is an free eBook reader that supports numerous file formats like ePub, fb2, plucker, HTML, plain text, doc and more. You can also add multiple books at once in an archived format (tar, zip, gzip, bzip2). It supports embedded images, footnotes, hyperlinks, text search and full screen reading. It also has automatic bookmarking so that you don’t lose your place when closing a book.