Howto create ringtones with Ringtone Expressions [Video]
Ringtone Expressions is a free applications, that allows users to create ringtones for iPhone easy and fast. It supports creating ringtones using Drag and Drop from iTunes, from YouTube videos, from your computer’s mic. It also sllows users to share thier ringtones via Facebook and Twitter.
Along with iPhone there is support for BlackBerrys and Windows Mobile.