Winterboard - Give your iPhone or iPod Touch a graphical overhaul!
Cydia - An alternative app store for jailbroken devices.
Dreamboard - DreamBoard lets you take control over the homescreen of your jailbroken iPhone.
Zestia - Zestia is a mobile app designed to assist you in organizing your hectic schedule, social life, and professional persona.
Cylinder - Sexy homescreen icon animations
Fnd - Browse Apple App Store and iTunes on the Web