Loyalty Card Keychain - Saves all your loyalty cards on your phone
QuickMark - QuickMark makes everything possible.
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?
Barcode & QR Code Scanner - A free app which allow to read and generate barcodes for Android.