Style guide for Twitter bootstrap
Viewport Responsive Web Typography from #css-tricks
Just heard about this today at #ccsf --sounds like a good js intro.
Interactive Data Visualization for the Web, free to read online. (Learn d3!)
REFERENCE. Site with some nice examples of front-end code. http://pea.rs/
HTML5 / CSS3 intro
Free e-books for web designers
Form Builder http://www.uiparade.com/wp-content/themes/artiste/live-tools/form-builder.html
Videos of jQuery UK 2012 talks are up on Lanyrd. Especially good if you are intermediate at js/jquery and working on leveling up.