Xilisoft iPhone Ringtone Maker for Mac allows you to create your own iPhone ringtones from your favorite music. The range of formats is very impressive including AVI, MPEG, WMV, DivX, MP4, H.264/AVC, AVCHD, MKV, RM, MOV, XviD, and 3GP plus audio formats such as MP3, WMA, AAC, WAV, RA, M4A, and AC3. If you've ever wanted to create a ringtone, everything you'll need it here.
Xilisoft iPhone Ringtone Maker for Mac features the same interface as most Xilisoft products. Simply clip a segment of an audio or video file and set it as your ringtone. To tweak it, you can add fade-in and fade-out effects to iPhone ringtone.
The only problem I found was the installer took a long time to initialize. It took almost 5 minutes before it kicked into action and then there was another 5 minute pause at the end while it ran the package scripts.
If you want to create your own iPhone ringtones, you'll have a lot of fun with Xilisoft iPhone Ringtone Maker for Mac.