Winterboard - Give your iPhone or iPod Touch a graphical overhaul!
Galarm - Social alarm clock and reminders
Dreamboard - DreamBoard lets you take control over the homescreen of your jailbroken iPhone.
Alarmy - World's most annoying alarm app
Cylinder - Sexy homescreen icon animations
Alarm Clock Xtreme - Alarm Clock Xtreme: Alarm, Stopwatch, Timer (Free) is the most popular alarm clock app created and published by AVG Labs for both iOS and Android devices.