There's a greasemonkey script called UnFuck Facebook, which does exactly that - ...

		sprig on April 17, 2008 \| parent \| context \| favorite \| on: Facebook knows who you are, and that's worth more ... There's a greasemonkey script called UnFuck Facebook, which does exactly that - It hides all app things and auto ignores apps sent to you, hides all Facebook ads and makes it look very clean in general.