Impress.js
It's a presentation framework based on the power of CSS3 transforms and transitions in modern browsers and inspired by the idea behind prezi.com.
Sortable
Sortable — is a minimalist JavaScript library for reorderable drag-and-drop lists on modern browsers and touch devices. No jQuery. Supports Meteor, AngularJS, React and any CSS library, e.g. Bootstrap.
JS Xlsx
Javascript XLSX / XLSM / XLSB (Excel 2007+) parser and (one day) writer
Select2
Select2 is a jQuery based replacement for select boxes. It supports searching, remote data sets, and infinite scrolling of results.
React Virtualized
React components for efficiently rendering large lists and tabular data
Material Design Lite
Material Design Components in HTML/CSS/JS
Underscore
JavaScript's utility _ belt
Request
Simplified HTTP request client.
Faker.js
generate massive amounts of fake data in Node.js and the browser
Slick
the last carousel you'll ever need
jQuery File Upload
File Upload widget with multiple file selection, drag&drop support, progress bars and preview images for jQuery. Supports cross-domain, chunked and resumable file uploads and client-side image resizing. Works with any server-side platform (PHP, Python, Ruby on Rails, Java, Node.js, Go etc.) that supports standard HTML form file uploads.
Full Page.js
fullPage plugin by Alvaro Trigo. Create full screen pages fast and simple
Relay
Relay is a JavaScript framework for building data-driven React applications.
Ramda
:ram: Practical functional Javascript
Phaser
Phaser is a light-weight 2D game framework for making HTML5 games for desktop and mobile browsers
Js Pdf
Generate PDF files in JavaScript. HTML5 FTW.
Fabric.js
Javascript Canvas Library, SVG-to-Canvas (and canvas-to-SVG) Parser