Barcode Scanner This app lets you can barcodes on different products and then look at reviews and prices. This great if you are planning a big shopping day.
ScanLife Barcode & QR Reader This app lets you scan QR and UPC barcodes to launch videos, prices and reviews. You can get information on DVDs, Books, Food and many more items. You can also get these items off of amazon.com
ShopSavvy Barcode Scanner This is the original barcode scanner for Android. All you have to do is aim the camera at a product's barcode, wait for a beep and the app will give you a list of online and store prices.