jquip : Smaller, Lighter, Faster, more modular jQuery - include only the parts you want! Don't use it, Don't include it.
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 ...
howler.js : howler.js is an audio library for the modern web. It defaults to Web Audio API and falls back to HTML5 Audio.
yepnope.js : A Conditional Loader For Your Polyfills!
ProseMirror : In-browser structured text editing component. A toolkit for building rich-text editors on the web.
Sammy is a tiny javascript framework built on top of jQuery, It's RESTful Evented Javascript.