Picard Barcode Scanner helps you to tag your physical releases with MusicBrainz Picard. It allows you to scan the barcode of e.g. a CD and have the corresponding metadata from MusicBrainz automatically loaded into Picard on your desktop.

This is especially useful if you have your physical music collection already digitalized and want to tag the files using the correct album.

github.com/phw/PicardBarcodeScanner