Is there any free ringtone apps for iPhone?

I'm looking for an app where you don't need to sync your phone to iTunes just to get the ringtone. Is there any app?

Keep in mind also you can any any song or ringtune into itunes without ever having to purchase it. Some think you have to purchase in itunes, you don't… You can just use anything free, add it to the itunes list, and then add to the phone.