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PIE makes Internet Explorer 6-9 capable of rendering several of the most useful CSS3 decoration features.
An interactive CSS playground and code sharing tool. Dabblet saves to Github gists and offers many conveniences for CSS editing.
Lea Verou | CSS3 Secrets: 10 things you might not know about CSS3 | Fronteers 2011
State of the art: patterns with CSS3!
And http://css3pie.com/ teaches the old fashioned IE…
