Beer Buddy Barcode Scanner for iOS (normally $3.99) was free yesterday. I was able to get in on this and it's a cool app. It allows you to scan a barcode or search to pull up the ratebeer info for a particular beer. I like it!
The ratebeer app for Android, is essentially the same thing. It also allows you to scan barcodes and integrates with ratebeer. It's currently free.
ratebeer Android App - Free