Submission + - Google releases JavaScript Library (blogspot.com)
Art3x writes: Google has released an open-source, modular JavaScript library called the Closure Library," which it developed in house for its own web applications like Gmail and Google Docs. "Web developers can pull just what they need from a wide set of reusable UI widgets and controls, as well as lower-level utilities for the DOM, server communication, animation, data structures, unit testing, rich-text editing, and much, much more."