BeschreibungObsqr is a fast and simple QR code scanner. It does just one thing and does it well - it scans.
Minimal design allows you to access QR content with a single tap.
By the way, it's free and open-source - check http://bitbucket.org/trikita/obsqr
Obsqr can decode the following QR types: URLs, phone numbers, SMS, geolocations, emails, contact information, applications on Market and plain text.