Like a Read It Later for CSS geeks. Curated. So you don't have to.

In CSS, HTML

Source: http://www.noupe.com/tools/css3-and-html5-toolbox-starter.html

Another great round-up of CSS3 and HTML5 tools.

In CSS

Source: http://www.impressivewebs.com/css3-text-shadow-ie/

This is by no means a one-size-fits-all solution, but if you have a simple text shadow that you want to present to IE users, and you prefer to avoid using a bloated script or plugin, then this single line of code could work.

In CSS

Source: http://www.css3.info/css3-animations-support-in-firefox-5-beta/

You can find full details of CSS3 Animations support in Firefox 5 on the Mozilla Developer Network, and details of CSS3 Animations support in Webkit can be found on the Webkit blog. To date Webkit and Firefox are the only browsers to have implemented CSS3 Animations.

In CSS

Source: http://necolas.github.com/normalize.css/

Normalize.css is a customisable CSS file that makes browsers render all elements more consistently and in line with modern standards. We researched the differences between default browser styles in order to precisely target only the styles that need normalizing.

Source:http://w3fools.com/

We are passionate about the web, learning, and craftsmanship. We want you, as web designers and developers, to be successful in your careers. We feel, though, that W3Schools is harming the community with inaccurate information. Like any other authoritative educational resource, W3Schools should both hold itself to, and be held to, the highest standards.

Ouch!

Constantly updated and in no particular order, the best of the best.
What have I missed?

Thanks to redteamdesign and CSS Wizardry for their excellent tutorials.

CSS

FIXERS

BUTTON MAKERS

ANIMATION

TYPOGRAPHY

DESIGN USEFUL

HTML

INSPIRATION

Source: http://people.mozilla.com/~prouget/ie9/

Mozilla’s proclamation to Microsoft.

In CSS, HTML

Source:http://blog.typekit.com/2011/02/10/type-study-an-all-css-button/

Nice article from Dan Cederholm on an all-CSS/web fonts button.

CSS3 for Web Designers

Source:http://www.abookapart.com/products/css3-for-web-designers

Another excellent book from Dan Cederholm.

From advanced selectors to generated content to the triumphant return of web fonts, and from gradients, shadows, and rounded corners to full-blown animations, CSS3 is a universe of creative possibilities. No one can better guide you through these galaxies than world-renowned designer, author, and CSS superstar Dan Cederholm. Learn what works, how it works, and how to work around browsers where it doesn’t work.