Stocard!
I just recently downloaded this app and it is great! Do you have a lot of loyalty cards taking up space in your wallet? With Stocard, you simply scan your card and the barcode is saved in the Stocard app. When you need to use the loyalty card, you just open the app and the business can scan the barcode on your smartphone.
If there are flyers or offers available for your cards, the app will let you know and you can view the flyer or offer on your phone. Also, if you have a loyalty card for a store and you walk into the store, the app will notify you of any specials they have.
I love this app, and my wallet is lighter! Give it a try; it is free for Android and iPhones. http://stocardapp.com/