CleanMyMac X - Clean, protect and speed up your Mac
HiddenMe - Hide desktop icons with a single click.
Fossils - Find and clean out all your old unused files
Camouflage - Do you have way too many items on your desktop? Do you hate cleaning up that mess?
DaisyDisk - DaisyDisk is a disk analyzer tool for OS X that visualizes hard disk usage and allows to free up hard disk space.
Pliim - One click and be ready to go up on stage and present!