Modernizer. Helps to keep us sane.

Modernizer, a great tool to help out with browsers that aren't quite up to snuff possibly due to age, or just lack of software ability. If your browser can run javascript, modernizer will run and help to show all the goodness that the site designer put into his CSS. It does this by checking the browser info and then going and getting the correct parts that may be browser dependent. Similar to the -moz-whatever that would have to be put into every css file if you wanted some feature in mozilla to work. It does the work for you.