Artis Software and
have released xScope 1.0, a US$14.95 set of Mac OS X designer tools for measuring, aligning and inspecting on-screen graphics and layouts.
xScope consists of six tools: Rulers (on-screen rulers that measure distances and angles), Screens (a view of smaller screen sizes and browser content areas), Loupe (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 and origin alignment) and Crosshair (finds the exact location on screen). All of tools are accessible by menu bar icons, a floating toolbar or user-definable hotkeys
xScope is compatible with Mac OS X 10.2 (“Jaguar”) and 10.3 (“Panther”). Artis Software and the Iconfactory recommend using the tools with Panther for the best performance.