I have always loved a few key options Compiz on Linux has. A lot of them are considered eye candy, but a few of them I find to make me a tad bit more productive.
One of those features is called “Scale” (OSX names it Expose). Unfortunately, Windows doesn’t have this option (except 3rd party).
Switcher for Windows 7
One I found to work fairly well is called Switcher ( http://insentient.net/ ).
I customized mine to make it a little easier on the eyes.