ZXing - Barcode Scanner for Android
Barcode Box - Records a list of barcodes when you scan them and reminds you if you've seen it before.
QuickMark - QuickMark makes everything possible.
JD Sports - JD Sports is a free shopping platform that design for those who want to buy sports products like trainers, apparel, equipment, and accessories.
QR Droid - QR Droid Zapper
NeoReader - The NeoReader is a universal barcode scanning app that transforms your mobile phone into a barcode scanner, allowing access to mobile web content by scanning codes from virtually any medium