Backdrop - Backdrop is a simple utility to fill your screen with a giant blank window.
Zorro - Freeware Windows system utilities. Home of Send To Toys, Zorro, and Restart.
HiddenMe - Hide desktop icons with a single click.
Pliim - One click and be ready to go up on stage and present!
HazeOver - Focus on one app by dimming all the background windows
psKino - A program that darkens the whole Screen, except an user-defined area (which may include a video)...