MusicBrainz

MusicBrainz is an open music encyclopedia that collects music metadata and makes it available to the public.

This is not a tagger. It provides the following features:

* View release info by scanning the barcode
* Search for artists and releases
* View artist bios
* Submit tags and ratings
* Add and remove releases from your collections
* Submit barcodes
* Donate to the MetaBrainz Foundation via PayPal