Nice tool for web designers to save time coding CSS. CSS3PS is a free Photoshop plugin that helps us convert shapes that we designed with Photoshop to CSS3 code.
You can create shapes with stroke, border radius, drop shadow, inner glow, outer glow, inner shadow and add gradient overlay to your shape, then the plugin will generate the CSS3 code for you.
This plugin work with Windows or Mac OS X and Photoshop CS3 and later. You can download CSS3PS at no cost.

How it works video
Link: CSS3PS