ActiveJS : ActiveJS is a JavaScript application framework that provides local and REST based data modeling and pure DOM view construction with back button and hi...
emotion : emotion is a high performance, lightweight css-in-js library that supports both string and object based styles.
Javascript Sound Kit : The Javascript Sound Kit is a wrapper around the ActionScript Sound Object, it makes it possible to use the Sound Object in Javascript the same way yo...
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...
Crafty : JavaScript Game Engine, HTML5 Game Engine
Not all browsers support stack traces on error objects, but TraceKit squeezes out as much useful information as possible and normalizes it.