inFlow Inventory - inFlow Inventory is inventory management software for small businesses.
calibre - Ebook manager, viewer & converter
Snipe-IT - Managing assets with a Google doc or a shared Excel spreadsheet is more common than you think.
FBReader - FBReader is an e-book reader for various platforms. Features:
Skyware Inventory - Web-based Inventory Management.
Google Play Books - Google Play Books lets you search, preview, and buy millions of books using Google Book Search.