Google have released their core JavaScript developments tools to the wider community. Apparently they hope that faster, more reliable internet applications will be developed using the same technology used to build popular web apps such as Gmail and Google Docs.
Web applications have evolved from simple HTML pages into rich, interactive applications that provide a great user experience. Today's web apps pose a challenge for developers, however: how do you create and maintain efficient JavaScript code that downloads quickly and works across different browsers?
The Closure tools help developers to build rich web applications with JavaScript that is both powerful and efficient.