Wavesurfer.js
Navigable waveform built on Web Audio and Canvas
Coffee Script
Unfancy JavaScript
Showdown
JavaScript port of Markdown
Cytoscape.js
A JavaScript graph library for analysis and visualisation (compatible with CommonJS/Node.js, AMD/Require.js, jQuery 1.4+, Bower, npm, and plain JavaScript)
Rx Js
The Reactive Extensions for JavaScript
Mithril.js
A Javascript Framework for Building Brilliant Applications
Lazysizes
High performance and SEO friendly lazy loader for images (responsive and normal), iframes and more, that detects any visibility changes triggered through user interaction, CSS or JavaScript without configuration.
Polymer
Leverage the future of the web platform today.
Bootstrap Table
An extended Bootstrap table with radio, checkbox, sort, pagination, and other added features. (supports twitter bootstrap v2 and v3)
Sweetalert2
A beautiful, responsive, highly customizable and accessible (WAI-ARIA) replacement for JavaScript's popup boxes. Zero dependencies.
Bootswatch
Themes for Bootstrap
Cropperjs
JavaScript image cropper.
Chosen
Chosen is a library for making long, unwieldy select boxes more friendly.
Mqtt.js
The MQTT client for Node.js and the browser
Hyperapp
1 kB JavaScript framework for building web applications.
Nock
HTTP mocking and expectations library
Hammer.js
A javascript library for multi-touch gestures // You can touch this