Progressive Internet Explorer

CSS3 Pie is a JavaScript based tool and very simple to implement it in your site. It helps Internet Explorer to recognize cool CSS3 features. Read it here to know how to implement it in your site. PIE (a.k.a. Progressive Internet Explorer) currently has full or partial support for the following CSS3 properties: border-radius, box-shadow, border-image, multiple background images, and linear-gradient as background image.  (Via)