From Red Tree Software:
With Mp3DJ crank up the volume and take control of your music collection. Mp3DJ tracks down all your music files (MP3, WMA, WAV, M3U) and keeps them organized. Powerful features quickly search, categorize, and play your music. Mp3DJ also edits file tags, finds album cover art, manages your play lists, plays hours of your favorite music with the click of a button. Version 1.7.1 may include unspecified updates, enhancements, or bug fixes.