Use this program to edit your playlists, including limited MP3 tag editing functions. Also includes editing of filenames and playlist titles. Simple but very powerful interface for using filename, title, or tag to change the others (for batch processing). I don't have much use for it, but hopefully someone else will.
Application (32-Bit Windows)
Sorry, no source for this one. Took too long to write, but I may post it in the future.