A free program for Android, by j labs.

If you’re looking for the loudest alarm clock that can surely wake you up, then this app is the best one for you!

This app contains volume-boosted audio files that make an excellent alarm tune. You can assign different sounds each morning to avoid becoming accustomed to it. Get amusing voices like Stewie and Hermione to encourage you to wake up if you continue to sleep. You can also specify a time limit after which you will no longer be able to snooze.

Other cool features of this Android app include weather for your location and an absolutely gorgeous, customizable alarm clock design.