You can have a look at http://code.google.com/p/closure-library/ http://code.google.com/p/closure-library/. What I did downloaded the files and peeked through a

You can have a look at http://code.google.com/p/closure-library/ http://code.google.com/p/closure-library/. What I did downloaded the files and peeked through all of them. Closure has not been very popular with the community, but is currently running all google applications such as Gmail.