Papa Parse
Fast and powerful CSV (delimited text) parser that gracefully handles large files and malformed input
Popmotion
A 12kb Javascript motion engine. Use for animation, physics and input tracking.
Fastclick
Polyfill to remove click delays on browsers with touch UIs
Parsley.js
Validate your forms, frontend, without writting a single line of javascript!
Tone.js
A Web Audio framework for making interactive music in the browser.
Mjml
MJML: the only framework that makes responsive-email easy
Sweetalert2
A beautiful, responsive, highly customizable and accessible (WAI-ARIA) replacement for JavaScript's popup boxes. Zero dependencies.
Prism
Lightweight, robust, elegant syntax highlighting. A spin-off project from Dabblet.
Tinymce
TinyMCE is a JavaScript library for platform independent 'WYSIWYG' or rich text editing. It is released as open source under the LGPL.
Fine Uploader
Multiple file upload plugin with progress-bar, drag-and-drop.
RequireJS
A file and module loader for JavaScript
Scroll Reveal.js
Declarative on-scroll reveal animations.
Mediaelement
HTML5 <audio> or <video> player with Flash and Silverlight shims that mimics the HTML5 MediaElement API, enabling a consistent UI in all browsers.
Mojs
motion graphics library for the web
Aos
Animate on scroll library
Ol3
OpenLayers 3