This is actually fairly old, from 2009. Same thing demonstrated in 2008 - http://www.howtocreate.co.uk/tutorials/css/slopes http://www.howtocreate.co.uk/tutori

This is actually fairly old, from 2009. Same thing demonstrated in 2008 - http://www.howtocreate.co.uk/tutorials/css/slopes http://www.howtocreate.co.uk/tutorials/css/slopes And more polygons by Tantek Çelik in 2001 - http://tantek.com/CSS/Examples/polygons.html http://tantek.com/CSS/Examples/polygons.html The speech bubble effect in the demo can also be done without presentational markup by using pseudo-elements - http://nicolasgallagher.com/pure-css-speech-bubbles/ http://nicolasgallagher.com/pure-css-speech-bubbles/