QuickMark - QuickMark makes everything possible.
QR Droid - QR Droid Zapper
QR Code Reader “Q” - Formerly QR Code Reader “Q,” now QRQR, is a smart code reader application.
ZXing - Barcode Scanner for Android
Lynkee Reader - Lynkee Reader is the best QR & Barcode Reader application on the market.
PDF417 Barcode Scanner - Qrafter is an amazing QR code and Barcode scanner for your android and iPhone devices.