A few new tools are out for iPhone users that want customized ringtones on their cell phones.

A couple of new programs, iToner by Ambrosia Software, and RingtoneStudio by PocketMac, will allow users to choose what songs they want to hear when the phone rings. 

Essentially these two programs convert various other multimedia formats into one that is appropriate for the iPhone.

The iToner application is designed to with with iTunes 7.7 and the 3G line of iPhones.

RingtoneStudio, on the other hand, has a few extra features, such as trimming songs to an appriate length for a ringtone, which make it a great choice as well.

Both products are about $15 dollars, which isn't a bad deal.