Stocard - All loyalty cards on your smartphone!
ZXing - Barcode Scanner for Android
Key Ring Reward Cards - Tired of all the loyalty cards dangling from your keys or stuffed in your wallet?
QuickMark - QuickMark makes everything possible.
CardStar - Leave those bulky plastic “reward cards” and “club cards” at home!
QR Droid - QR Droid Zapper