Zen Coding
Download Squad has a quick review, with video, of Zen Coding (Google Code project page here), an extremely well-thought-out accelerator for anyone who codes HTML. Its syntax is CSS-like. Zen Coding has been around for a while — here's its author Sergey Chikuyonok's introduction in Smashing Magazine from last November — and it has now picked up support for more than a dozen editing environments, including Notepad++ and TextMate.
Check the TUTORIAL file in the repo to either turn on by filetype or globally
...crappiest article ever to get frontpaged on slashdot.
It's a couple hundred words worth of "OMG!" with a code example.
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