A tag editor (or tagger) is a piece of software that supports editing metadata of multimedia file formats, rather than the actual file content.
Mp3tag is a powerful and yet easy-to-use tool to edit metadata of common audio formats where it supports ID3v1, ID3v2.3, ID3v2.4, iTunes MP4, WMA, Vorbis Comments and APE Tags.
TagScanner is a multifunction program for organizing and managing your music collection.
Auto tag of lyrics and cover arts from internet, auto tag from file names, organize and rename files, case conversion, remove tags, execute scripts, etc.
MusicBrainz Picard adopts a different way of updating tags via its online database.