calibre - Ebook manager, viewer & converter
FBReader - FBReader is an e-book reader for various platforms. Features:
Icecream Ebook Reader - Ebook Reader by Icecream Apps allows to read ebooks in several formats (EPUB, MOBI, FB2 and others). Download EPUB Reader for Windows.
Google Play Books - Google Play Books lets you search, preview, and buy millions of books using Google Book Search.
Adobe Digital Editions - ebook reader software
Calibre Web - Calibre Web is a web app providing a clean interface for browsing, reading and downloading eBooks...