The prime purpose of the KatMouse utility is to enhance the functionality of mice with a scroll wheel, offering 'universal' scrolling: moving the mouse wheel will scroll the window directly beneath the mouse cursor (not the one with the keyboard focus, which is default on Windows OSes). IMO this is a major increase in the usefullness of the mouse wheel.

Program Information Category: Tools and Utilities Type: Free Version: 1.02 Size: 285KB Works on: Windows Product page: here