DOMAssistant : The modular lightweight JavaScript library, with CSS selectors, event handling, AJAX and complete Unicode support
base2 : base2 is a lightweight library that irons out all the annoying differences in JavaScript implementations. It provides the additional functionality fro...
Zepto.js : Zepto is a minimalist JavaScript library for modern browsers with a largely jQuery-compatible API. If you use jQuery, you already know how to use Zept...
loglevel : Minimal lightweight logging for JavaScript, adding reliable log level methods to wrap any available console.log methods
The Closure Compiler, Library, Templates, and Stylesheets help developers create powerful and efficient JavaScript.