Ringy Dingy is A tool that allows you to create ringtones for iPhone. it help you turn your prefered iTunes music files (m4a) into iPhone compatible ringtones.
You can create ringtones from iTunes tracks and most audio and movie files. There are no per-ringtone fees and you dont need to jailbreak your iPhone. You simply drop the track into the program, select the desired audio, and your ringtone will be placed in the ringtones section of iTunes, ready to sync with your iPhone.

Compatible with:
1. iTunes
2. iPhone
3. iPod Touch

Ringy Dingy Features:
1. Custom Interface Window
2. The software window is customized to look just like an iPhone. The window rotates horizontal and vertical and new screens zoom and slide off making ringtones easy and fun to create.
3. File Formats
4. Works with audio files including AAC (m4a), MPEG-1 (mp3), Audio Interchange File Format (aif), and Waveform Audio Format (wav). Also works with MPEG-4 (mp4) video files.

Limitations:
* the ringtones will only be 3 seconds long

The license of this software is Free Trial Software, the price is $24.99, you can free download and get a free trial.