Great little article on how to make sense of the varnishstat output.
A helpful article on how to make HTTP requests by hand via telnet. Doesn't work by hand for me, only the script approach works. But useful nonetheless.
Very useful article on offline web apps using HTML5 cache manifests.
Get a grade for your twitter profile. I was rated 1m out of 8m, whatever that means. Used by pay4tweet.com to gauge price of paid tweets.
Tagline "Online advertising technology. made simple". Not quite sure what it does, but looks worth remembering.