You can find Qrafter on http://qrafter.com/get/
Cheers,
Kerem
It is compatible with the ZXing launch scheme described on https://code.google.com/p/zxing/wiki/ScanningFromWebPages
You can use the qrafter:// scheme. Also, if you use browser=external as a parameter, it will launch Safari instead of its own in app browser.
Cheers,
Kerem