To all .NET Web developers: this is a must have tool for in your tool belt!
CSSCop makes it easy to adhere to best practices for writing stylesheets. It catches common errors that affect browser compatibility and much more.
It uses the widely used CSS Lint tool behind the scenes. CSSCop brings it directly into Visual Studio in an easy and convinient way.
Download available here: http://visualstudiogallery.msdn.microsoft.com/a921b98e-9430-4be2-bf53-1169e12bdb50