What's a good program for tagging lots of mp3s?

[Phokus]

I have a lot of mp3s that need to get their tags fixed... what's a good (preferrably free/opensource) program to do that?

 

[Nohr]

Mp3tag works great for me, though I've only ever used it for maybe a couple dozen mp3s at a time. I don't know how well it'd handle a large amount, but it's worth a try.

 

[EeyoreX]

This is what I use. At most I have used it to work with about 1500-2000 MP3s at once.

\Dan

 

[BlueWeasel]

I like MP3tag as well, but I've only used it for 50 songs at once.