Great examples of creating complex backgrounds with CSS, sans images. The focus is on speed, by reducing HTTP requests, while avoiding the large data URI blocks within style sheets.
css3
CSS3 Generator
CSS3 Flexbox
This is quite possibly the most useful feature of CSS3, but I’ve heard almost nothing about it, and sadly cross-browser support is likely a long way off.
CSSWARP
Place test on a path via CSS – one of the last major steps to move beyond using images for fancy text treatments.
CSS3 properties accurately explained
Great inline examples.