Hot Corners 

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 ensure you privacy and security when you are away from your computer.
screen saver screensaver hot corners privacy security

Magic Screensaver Master 

screen (e.g. upper right corner) you canperform many tasks easily!Magic Screensaver Master is a program that can manage your screensaver behaviour just by positioning your mouse to aspecific area on the screen.
screensaver desktop start disable monitor screen mouse move set kill close restart