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
SecScanQR - The QR-Code Scanner/Generator that cares about your privacy
QR Droid - QR Droid Zapper
Kinoni Barcode Reader - Use your iPhone as a professional barcode scanner for your PC or Mac.
Binary Eye - Binary Eye is a Free Open Source barcode reader/scanner and generator.
QuickMark - QuickMark makes everything possible.