A free program for Android, by Red Reader.

Red Laser Barcode Scanner is a FREE QR code scanner app. No other barcode scanner in the store is as fast or as easy to use. Scan any QR code in seconds, no matter what you’re doing or where you are.

QR codes are everywhere. From your smartphone, to your laptop, to your tablet. You can scan them with this app to save time, and get a great experience. 

Red Laser Barcode Scanner is a fast, simple, and easy-to-use application. All you need to do is just point the camera to the QR code, and it will automatically recognize and scan it. You can also enter the barcode manually, which will be saved in the list for later use.