For basic drop shadow work, the Paint.NET Effect plug-in is a must-have for any amateur image editor. It does exactly what it says it will do without any form of fault.

The CSS Filter Effects specification, which is backed by Adobe, defines a mechanism for applying common graphical filters to Web content. It can be used to adjust brightness, saturation, hue, and ...

References CSS3 Info: Box-Shadow, One of CSS3′s Best New Features Advertisement Article continues below this ad Contributor ...