The Iconfactory xScope v3.2.2 (Mac OS X)

Created specifically for designers & developers, xScope is a powerful set of tools that are ideal for measuring, inspecting & testing on-screen graphics and layouts.

xScope is a powerful set of tools for designers that are ideal for measuring, aligning and inspecting on-screen graphics and layouts. The software consists of seven tools in one:

Dimensions - Find the size of anything on screen instantly
Rulers - On-screen rulers that measure distances and angles
Screens - A dynamic view of smaller screen sizes & browser content areas
Loupe - A magnifying glass that gives you a close-up view of your work
Guides - Markers for precise horizontal and vertical alignment
Frames - Markers for precise width, height & origin alignment
Crosshair - Finds the exact location on screen