movemouse
Move mouse pointer between screens with the keyboard
movemouse lets you 'memorize' several positions of the mouse pointer on however many screens you may have and then jump back to any of those positions using keyboard shortcuts. It will also optionally simulate a left mouse button 'click' after the move to raise the focus of the moved to location.
Although it can be used on single monitor systems, the purpose of movemouse is to make it easy to jump between open windows on multiple monitor systems.