ZXing - Barcode Scanner for Android
Five Stars - Discover millions of rewards from thousands of local businesses.
QuickMark - QuickMark makes everything possible.
PowerCard - PowerCard offers loyalty program services to brands and restaurants to help them reward their best customers.
QR Droid - QR Droid Zapper
QIVOS CLOUD - QIVOS CLOUD enables businesses to keep their customers loyal by offering a platform that has various capabilities.