Remove redundant styles with Dust-me Selectors
Part of keeping stylesheets up-to-date involves searching through the styles and removing them which have expired with no further use, previously involving a print out of the stylesheet, highlight pen and a copy of your source code.
A boring but essential part of everyday programming.
This Firefox plug-in is free and will remove all those redundant styles without the boring but necessary job of going through yourself.
Grab it here. 