calibre - Ebook manager, viewer & converter
Cool Reader - Fast and small cross-platform eBook reader for desktops and handheld devices
Adobe Digital Editions - ebook reader software
AlReader - Alreader.com - new perspective on reading e-books.
Bluefire - Bluefire Reader is your go-to reading application for ePub and PDF content, including ebooks from...
Amazon Kindle - Amazon Kindle software lets you read ebooks on your Kindle, iPhone, iPad, PC, Mac, BlackBerry, and...