It's been two years since xScope, a handy Mac design toolkit, updated to version 2, and today Icon Factory and ARTIS Software launched xScope 3. The app's got a brand new visual redesign, performance tweaks, and a free mirroring app for viewing parts of your Mac desktop on any iOS device. The app hovers over your workspace and offers a Swiss Army knife of tools including rulers, dimension measures, guides, and a loupe for examining elements close-up. The $29.99 app is a paid upgrade for anyone who bought the app before July 14, 2011. Users that have purchased since can upgrade for free, and for everyone else, it's currently on sale $19.99 in the App Store.