VeryExiguous is the sequel to my previous and relatively popular theme Exiguous.
Once more this is a 'learn keyboard shortcuts' theme - XFWM is particularly well stocked in this area anyway so this should be no problem. I personally find them far faster than selecting title bar buttons and my screen space cost money!
Incidentally there aren't any title bars at all. This is partially so that one can find where the buttons are, and they are actually there if you are accurate enough.