mp3 Tagging Software

Tag&Rename, no question.
From their site:

Quote:

Tag&Rename is a music files tag editor that easily handles all popular digital audio formats. No matter what music compressor you prefer, you can keep your music collection organized with Tag&Rename since it is the only tag editor and organizer which has full native support for: mp3 (ID3v1, ID3v2.2, ID3v2.3 and ID3v2.4 tags), MusePack mpc/mp+ (APEv1, APEv2 and ID3v1 tags), Windows Media wma, asf and wmv files, Ogg Vorbis/Flac/Speex (vorbis comments), Apple iTunes and iPod aac (m4a) files including mp4, lossless m4a and protected m4p files, most popular lossless codecs including Monkey's Audio, Flac, Wav Pack, Optim Frog, True Audio, Apple, Windows Media lossless and Wav.

Tag&Rename supports many additional tag fields including lyrics, cover art, rating, mood, disc #, part of a compilation, album artist, classical music fields (Composer, Conductor, etc.), file related URL's and so on. With Tag&Rename, you can:

* manually edit music files tags
* automatically fix and complete file tags using online freedb database
* load titles and cover art from amazon.com server
* get tags data from file names and its folders structures
* rename your music files and folders according to its music information in a batch
* create play lists
* export files information to CSV, HTML, XML and text formats and more

Jam it back in, in the dark.