calibre - Ebook manager, viewer & converter
Bookfinder - Find nearly any book: new, used, rare and textbooks.
FBReader - FBReader is an e-book reader for various platforms. Features:
LaunchScore - Market research, simplified
Google Play Books - Google Play Books lets you search, preview, and buy millions of books using Google Book Search.
Bonjour idée - Startups, Business Ideas, experts.