Booxter

A personal librarian, at your service, to go... and FREE!
Booxter for the Mac has always been the app of choice for serious collectors. Whether it's books, movies, music or comics, you will love the way in which your items are organized.
Carry your collections with you with Booxter from the App Store!
Scan barcodes with your iPhone or iPod Touch and send them to Booxter on your Mac!
(Barcode scanning can be done with books, music and movies; comic book barcode scanning is not currently supported).
Download the newest version of Booxter for the Mac, and enable Sharing in the Preferences. When you run Booxter on your iPhone/iPod Touch you will see your shared libraries and be able to export to your mobile device over a WiFi connection.
In Booxter on your Mac, choose either Item->Add Multiple Items… or View->Code from the Main Menu to enable barcode scanning. Then on your iPhone/iPod Touch, tap the camera button at the top to start scanning barcodes over WiFi. It's that easy!
Like the Mac version, Booxter will display your library and lists, and let you filter by numerous criteria so you can find what you are looking for quickly and easily.
Searching is also supported so you can find what you are looking for instantly.
Histograms provide insightful information on the structure of your libraries, and links to Amazon and other sites make purchasing from your shopping lists easy. Send items by email for reference later.