Barcode Scanner - Barcode Scanner for Android
QuickMark - QuickMark makes everything possible.
Kinoni Barcode Reader - Use your iPhone as a professional barcode scanner for your PC or Mac.
MKH Barcode Reader - This tool can be used to scan QR codes on your PC or tablet. Note: a webcam is required.
Obsqr - obsqr is an open-source, fast and lightweight QR scanner for Android.
bcWebCam - Scan barcodes and QR Codes with your computer web cam