Barcode Scanner+ is an enhanced version of the popular, free Barcode Scanner application, which is a product of the ZXing open-source barcode scanning library. Barcode Scanner+ is based on the same code, and has been developed by one of the two primary authors of the original Barcode Scanner, Sean Owen.

Barcode Scanner+ includes all of Barcode Scanner's functionality, and is intended as a drop-in replacement. It adds several enhancements:

Better barcode scanning

Refined user interface

New features

Also available in "simple" version, without functionality that requires special permission. See here.

Purchasing this application also supports development of the ZXing open-source barcode scanning library.