Adding artwork to MP3s without iTunes?

I have all of my albums that i have both downloaded and ripped backed up onto one of my hard drives. A good majority of these mp3s don't have artwork attached to them. Is there a software out there that i can add the artwork to them, without pulling them into iTunes? I tried doing it through "Get info" but couldn't figure it out. Any suggestions are appreciated!

Get info should be very straight forward. Just click on the album than select artwork. Than click add, choose an image and your done.

Artwork Gofer worked well for me

I actually found this one called Media Rage to work really well, i was able to batch it all and do it fairly quickly.

I use SongBird instead of iTunes because I can listen to a whole album without checking off all the boxes and you can easily add art work. The way I do it is I do a Yahoo image search by ether album or artist when I see a cover I like I click and drag to my desktop, open SongBird and drag photo to the lower left corner , Presto album cover..

HTH, Rick