Here’s an interesting metric for measuring performance: take the overall page weight of a URL and divide it by the file size of the screenshot of that URL.
A nifty tool from Brad to help calculate and allocate performance budgets. Click around and edit the numbers.
A handy little for calculating your performance budget based on how long you want your page to take to load on a particular connection.
A brilliantly cool handmade iPhone case by Jane.
A handy tool for calculating grid and gutter widths although you'll still have to some calculating to get the figures to work in percentages (assuming you're designing for the Web).
Calculate your Web Coolness, courtesy of Cameron. Of course he couldn't resist one more jibe at me in there.
The fascinating story of an application built by ex-employees sneaking into Apple.