Dreamboard - DreamBoard lets you take control over the homescreen of your jailbroken iPhone.
Lockinfo - You can find this app in Cydia - Tweaks.
Springtomize - Tear down the walls
Five Icon Dock - Tweaks the dock of your jailbroken iPhone so that it can fit five icons instead of four.
vWallpaper - vWallpaper lets you set a video as your iPhone's wallpaper.
IntelliScreenX - Need to know where your next meeting is? Do you have any new email?