Steam's revamped mobile app is available for everyone on Android and iPhone - The Verge
Amazon.com : Tera 1D 2D QR Barcode Scanner Wireless and Wired with Battery Level Indicator Digital Printed Bar Codes Reader with Stand Portable Handheld Barcode Scanner Compact Plug and Play Model D5100-Z :
TouchArcade
This Nifty App Lets Consumers Scan Bar Codes to See Product Reviews
Wie man einen Steam-QR-Code scannnt und einloggt! - YouTube