Google released a couple of internal tools of theirs into the open source world (must be make-people-happy week in Mountain View). One of them is the Closure Library for JavaScript; check the API reference for more. Another is called Closure Compiler, aiming to shrink and performance-optimize your JS and alert you to problems with it... there's even an online app where you can paste your code into. The third in the bunch is called Closure Templates, and as Google explains in a ...
