Clikapad - ppvote software portfolio is a PowerPoint add-in that has been specifically designed to be used with CLiKAPAD audience response system hardware.
calibre - Ebook manager, viewer & converter
Imaginators - Create interactive presentations
FBReader - FBReader is an e-book reader for various platforms. Features:
Monterosa - Monterosa is an audience engagement platform that allows you to manage a large audience and conduct the poll in real-time.
Google Play Books - Google Play Books lets you search, preview, and buy millions of books using Google Book Search.