MakeOwnRingtone.com - Make your own ringtone! Follow the steps:
Audiko - Audiko Ringtones is a free to use mobile application that can help you customize your mobile phone by setting the most beautiful images your background and the most popular ringtones as your notification signals.
Ringer.org - Ringer.org is a free ringtone maker to make ringtones from any song or audio file.
i39 - i39 is a lightweight and efficient OS X app that manages to reduce the whole ringtone creating...
Cool Sounds - Sounds Collection: Animals, Humans, Tools, Ultrasounds, Ringtones and more...
Ringdroid - Create your own ringtone by editing a music track in your library, or record a new one directly...