Lockinfo - You can find this app in Cydia - Tweaks.
Springtomize - Tear down the walls
Dreamboard - DreamBoard lets you take control over the homescreen of your jailbroken iPhone.
Five Icon Dock - Tweaks the dock of your jailbroken iPhone so that it can fit five icons instead of four.
Infiniboard - Vertically scroll your home screen pages!
Cylinder - Sexy homescreen icon animations