http://kly.no/posts/2009_12_08__Varnishstat_for_dummies__.html
Great little article on how to make sense of the varnishstat output.
http://blog.tonycode.com/tech-stuff/http-notes/making-http-requests-via-telnet
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.
http://developers.whatwg.org/offline.html#offline
Very useful article on offline web apps using HTML5 cache manifests.
http://twittergrader.com/
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.
http://flashtalking.com/
Tagline "Online advertising technology. made simple". Not quite sure what it does, but looks worth remembering.
https://www.kissinsights.com/
A cool little survey tool that uses a javascript slide out to ask questions of visitors. Free for a few surveys with ads, or $25 - $29 a month for no ads and more response tracking.
