MusicBrainz Picard lets you label and tag your music with the correct ID3 tags of artists, albums, etc. quickly and easily.
Picard is the next generation MusicBrainz tagging application. This new tagging concept is album oriented, as opposed to track/file oriented like the ClassicTagger was. Picard is written in Python, which is a cross-platform language, and makes use of cross-platform libraries - this allows the same code to run both on Windows, Linux, and OS X.
Immediately organize your music collection and find missing song info.
Music discovery and playback tool.
Music downloader, specially optimized for music.
Music Hub gives you the freedom to stream unlimited music.
MusicBrainz Picard is the official MusicBrainz tagger.