Pre-loaders - ...loading

Great set of flat preloaders.
http://pixelbuddha.net/freebie/flat-preloaders

Fonts tool

I just seem to be posting all the great tools I've discovered recently, but this just means the blog is full of great reference material. No bad thing?
http://cssfontstack.com/

Responsive Social buttons

Great responsive social buttons from Kurt Noble Labs
http://kurtnoble.com/labs/rrssb/

CSS Magic

A fantastic site with loads of CSS magic explained really well, great job Adam Schwartz
http://adamschwartz.co/magic-of-css/