iTunes artwork/song software

[jjirons69]

I have over 6000 songs from everybody and everywhere. I've been doing the manual corrections for some time, but it's getting old. I know there are all kinds of software, both free and $, that claim to fix misspellings, apply artwork, etc. I already have a vast majority of it done. First, what are the good ones and what do they do. Second, will the application mess up what I already have. Being anal, I have all the artists, genres, and titles correct - I'd eventually like to have all the album titles, artwork, and year.