Dreamboard - DreamBoard lets you take control over the homescreen of your jailbroken iPhone.
LSrotator - LSRotator lets your iPhone's/iPod's lockscreen rotate according to your device's...
Springtomize - Tear down the walls
Cylinder - Sexy homescreen icon animations
Five Icon Dock - Tweaks the dock of your jailbroken iPhone so that it can fit five icons instead of four.
Lockinfo - You can find this app in Cydia - Tweaks.