This barcode scanner relies on Phonegap [1] and the ZXing (Zebra Crossing) [2] barcode scanner implementation which is part of the Phonegap plugins [3]
We evaluated several barcodescanners in form of a Hackday and figured out which is the best implementation for each platform (Android, iPhone) to use with Phonegap. Links
[1] http://www.phonegap.com/
[2] http://code.google.com/p/zxing/
[3] https://github.com/phonegap/phonegap-plugins/tree/master/Android/BarcodeScanner