Is there a way to create tags for mp3 files from just the title?

I have about 500 mp3s that are labeled "track #-Artist-Title", but the tags have been lost, so when I import them to ITunes, they just show up in that format. I'd REALLY rather not have to go track-by-track and relabel them, so if anyone knows of software (pref. freeware) that can somehow create the tags just based on filename, that'd be great. Cheers.