[Charlie]

TagScanner is a multifunction program for organizing and managing your music collection. It can edit tags of mostly state-of-the-art audio formats, rename files based on the tag information, generate tag information from filenames, and perform any transformations of the text from tags and filenames.

XDlab

[JMBB]

I've been using TagScanner for a long time. Very good for renaming tons of files. Can be a little quirky doing some things that are a little easier in other apps but it works well when you get to know it more.