Springtomize - Tear down the walls
Fences - Keep your desktop organized with Fences. This is a simple software program that allows you to sort the tabs on your desktop and create files that are easily recognizable to you.
Cylinder - Sexy homescreen icon animations
Nimi Places - Nimi Places is a Windows desktop organizer that gives you the ability to put files and folders into customizable containers. The elements in the containers are represented as icons or thumbnails. Read more about Nimi Places.
SwitcherMod - SwitcherMod lets you customize the iOS4 multitasking bar.
iCollections - Organize your Mac desktop items.