DOM Monster is a cross-platform, cross-browser bookmarklet that will analyze the DOM & other features of the page you're on, and give you its bill of health.
This little hack allows you to run two instances of Dropbox at the same time. Very useful if you have a work and a personal account.
Mockup phone and tablet prototypes for iOS 7, Android Jelly Bean and Windows 8 faster with this set. Includes keynote, omnigraffle and pdf files.
An updated selection of google webfonts (that don't suck).
UI-Less & Performant CSS Transitions & Animations
Free online tool lets you create and design 3D objects in CSS.
Style guides and documentation for any flavor of CSS that you’ll love to write.
Yes, it’s great to be married to a girl who works at Apple. Great perks and sometimes you even get to visit the famous 1 Infinite Loop Headquarters.
(The cake at Caffè Macs was just ok).
Tips, Resources and Patterns for Responsive Web Design
If you use Mint to track your visitors, Spearmint is probably the best theme available for it.