HiddenMe - Hide desktop icons with a single click.
PiP for Mac - Always on top window preview similar to the popular windows only OnTopReplica
Camouflage - Do you have way too many items on your desktop? Do you hate cleaning up that mess?
Helium - Helium lets you accept payments by credit card for anything you want to sell online.
Pliim - One click and be ready to go up on stage and present!
X-Mouse Button Control - XMouse Button Control (XMBC) allows you to create application and window specific profiles.