Mp3tag

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 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.
Mp3tag supports the following audio formats:
* Advanced Audio Coding (aac)
* Free Lossless Audio Codec (flac)
* Monkey's Audio (ape)
* Mpeg Layer 3 (mp3)
* MPEG-4 (mp4 / m4a / m4b / iTunes compatible)
* Musepack (mpc)
* Ogg Vorbis (ogg)
* OptimFROG (ofr)
* OptimFROG DualStream (ofs)
* Speex (spx)
* Tom's Audio Kompressor (tak)
* True Audio (tta)
* Windows Media Audio (wma)
* WavPack (wv)