Rulers is a Swiss Army app for Mac and Windows that combines rulers, a color picker, a magnifier, and screenshot tool into a free utility that even supports multiple monitors. You can customize the rulers' units (pixels, inches, or centimeters), opacity, color, and placement. Line markers can be placed (much like Photoshop) by dragging from a spot on the ruler to a spot on your screen.The color picker tool provides the hex and RGB codes of the pixel your mouse cursor is currently hovering over, and pressing Ctrl+C or Command+C will copy the hex code to your clipboard. There is a small magnifier in the color picker window as well.
The screenshot tool can either do simple full-screen captures to your clipboard or desktop, or you can create an area with ruler markers and then select one of those areas for a screenshot.
[Via CyberNet]
