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. It can rename files based on the tag information, replace characters or words in tags and filenames, import/export tag information, create playlists and much more. Mp3tag supports online database lookups from, e.g., Amazon, discogs, or freedb, allowing you to automatically gather proper tags and cover art for your music library.
Detailed description »

Changes in the last version:
Added Discogs via Release ID, dropped support for Amazon, basic support for Nero-style MP4 tags, improved handling of cue sheets