Collection of tools. Intended to be zero-dependency. One step above core, in Earl's view.

Code from this session is at http://drupal.org/Project/jQ4DaT
Slides are at http://tinyurl.com/jQuery-Designers - fingers crossed I'm typing all of this right.

I am having to be far more careful at drupalcon than I'd hoped. Instead of doing a full-blown free-for-all, I'm having to be choosy about what I do -- and I'm choosing to go to sessions. I came down with something nasty either in Huntsville or in Minnesota, and it was in full swing by the time I landed in San Francisco. What had originally been just an angry tickle in the back of my throat was so bad I couldn't swallow solids or liquids without pain.

(No, PHP, your ass doesn't look fat in that. Honest.)

Find the slides at: http://extras.jensimmons.com/drupalconsf2010/css3.pdf

Presented by the technical lead from Trellon.

APIs let your code interface with other codes - core or contrib.
if you write code, other developers will want to interfact with yours. If you think in terms of Apis, your code quality improves.

Which APIs should you know?