Time saver: iOS App Icon PSD Template
Design an iOS app icon once, automagically render all the smaller size icons (using PS smart objects).
(Nice CSS background position animation on the website too)
Awesome alert: CSS DECK - A collection of pure CSS creations which you can tinker around with - designed to help frontend coders realize the power and flexibility of CSS (via builtwithbootstrap)
http://css3test.com/ Test which CSS3 features your browser recognizes. Lea Verou explains more in her blog post
Pea.rsis a free open source WordPress theme which helps you set up your own pattern library (for HTML and CSS patterns). By Dan Cederholm (who made Dribbble)
A beginners guide to HTML and CSS via @SmashingMag (edit: By Code Academy instructor Shay Howe, HT codeacademy.org)
“Look up HTML5, CSS3 features, know if they are ready for use, and if so find out to use them – with polyfills, fallbacks or as is”
The Expressive Web - Awesome HTML5 / CSS3 site from Adobe with examples, tutorials and more.
HTML5 CSS3 Advent calendar with pro tips
Fluid Squares is a mobile-first, HTML5 fluid grid framework whose units remain square and uses CSS3 Media Queries.
TeamTreeHouse: Learn how to make the internet
Watch videos, take tests, earn badges, launch your startup.
Trend: The gamification of Education (and everything really). Think Codecademy.
Pretty sweet responsive site as well.
CSS Awards - 15 Beautiful Website Designs For Your Inspiration Timberland’s Women’s Fall 2011 (via Inspired Magazine)