A Ruler for Windows is a free virtual on screen ruler for Windows.
Editor: With A Ruler for Windows you have your choice of a rich woodgrain ruler, or at the touch of a button, a clear see-through Plastic ruler.
A Ruler for Windows lets you Layer one or more Rulers on your screen at once. As you can see through the clear plastic ruler you can even continue typing under it.

Special 2x, 3x, and 4x modes allow you to take a snapshot of your primary screen and Magnify it so you can more easily measure Between very fine points.

Ticks can be placed on which ever long edge you prefer. You can click near tick to have a measuring lin automatically drawn at an exact location.

The ruler can be flipped horizontally or vertically, resized to an exact length or resized by dragging it to a desired length.You are welcome to use A Ruler for Windows for free on as many computers as you would like. you can free download A Ruler for Windows 2.0 now.