Looking for an mp3 editing program

I am looking for a free Mp3 editing program, basically for cutting bits from tracks - like the intro to certain songs, so as to use them as a mobile ringtone, but not have to wait for the quiet intro, therefore missing the call.... make sense?

Thanks

 

Try Audacity, it's open source.

 

Thanks Taff, that looks like a pretty good program

Except that when I download it from the site, it says that the file is empty...