“20 Things I Learned About Browsers and the Web” is a short guide for anyone who’s curious about the basics of browsers and the web." The illustrations are great and the implementation (using the canvas tag) is slick.
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The Great Typekit Table
The folks at Sleepover have compiled a sortable list of Typekit-powered fonts that meet two key guidelines: "first, the font had to have lower case, upper case, bold, italic, and bold italic; second, the font couldn’t be handwriting, script, or monospace."
Make WordPress Scale, on a Budget
The 30 CSS Selectors you Must Memorize
This is the best breakdown of selectors I've seen. An excellent reference for all Web developers.
Freepik
A search engine for free photos and vector illustrations.