Cool Reader - Fast and small cross-platform eBook reader for desktops and handheld devices
Documents by Readdle - A central hub for all your files.
Amazon Kindle - Amazon Kindle software lets you read ebooks on your Kindle, iPhone, iPad, PC, Mac, BlackBerry, and...
FileApp - FileApp is an iPhone and iPad File System and Document Viewer.
AlReader - Alreader.com - new perspective on reading e-books.
FE File Explorer - The one-stop files solution