This program is pretty cool. Especially if you are a last.fm user. It automatically fetches the ID3 tag data for your currently playing song and allows you to update the meta data in your song. Moretunes is a bit different than the MusicBrainz classic tagger, in that it does not require you to open the files in a separate application. Moretunes works in tandem with your music player and detects when the song changes.  It has a mini view that only shows the album cover as well as the full info view shown below.