Hot Corners 2.6

Hot Corners lets you quickly activate or disable your screen saver by moving the mouse into any corner of the screen that you set. This is particularly useful when you need to leave your computer for a brief period, but don't want anybody to be able to access it.

Using Hot Corners, you can turn on your screen saver instantly, and know that your computer is protected while you are away. For people who work in an office environment, where the information on their screen is sensitive and possibly confidential, the ability to have instant privacy is crucial. Hot Corners is very customizable, and even allows you to control the power saving features of your monitor.

Screenshot :

Feature : 

Immediate privacy
You can configure Hot Corners to blank the screensaver in as quick as 1/5 of a second
Change things up
Hot Corners can start a different screensaver each time you activate it

Download Link :

Hot Corners 2.6