Parsley.js : Javascript forms validation.
Powerful, UX aware & Dead simple.
D3.js : D3.js is a JavaScript library for manipulating documents based on data. D3 helps you bring data to life using HTML, SVG and CSS. D3’s emphasis on web ...
Vex : Vex is a modern dialog library which is highly configurable, easily stylable, and gets out of the way. You'll love vex because it's tiny (6kb minified...
Microjs : Fantastic Micro-Frameworks and Micro-Libraries for Fun and Profit!
TraceKit : Not all browsers support stack traces on error objects, but TraceKit squeezes out as much useful information as possible and normalizes it.
The Closure Compiler, Library, Templates, and Stylesheets help developers create powerful and efficient JavaScript.