XRECODE - XRECODE can convert multiple audio files in parallel by taking full advantage of multi-core CPU.
Song Cutter and Ringtone Maker - Free Online Ringtone Maker
Freemake Audio Converter - Audio Converter is a free to download file converter tool software developed by Freemake. Freemake has developed many free tools in the past, such as the popular Freemake Video Converter. Read more about Freemake Audio Converter.
MakeOwnRingtone.com - Make your own ringtone! Follow the steps:
Convertio Online Audio Converter - Convertio Online Audio Converter allows everyone to convert audio files in any format directly from their web browser.
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.