Ringtone Creator is a professional tool for the conversion of cell phone ringtones. It is available as a visual converter (for ringtone composers, content providers and aggregators) and as a Java library for on-the-fly ringtone manipulation (for software developers).
It features sophisticated algorithms providing excellent results, What's New
Version 2.4.032: Release notes were unavailable when this listing was updated. Requirements
PPC, Mac OS X 10.3 or later
*Previously available here