Dropzone
Dropzone is an easy to use drag'n'drop library. It supports image previews and shows nice progress bars.
Framework7
Full Featured HTML Framework For Building iOS & Android Apps
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.
Highcharts
Highcharts JS, the JavaScript charting framework
FileSaver.js
An HTML5 saveAs() FileSaver implementation
Ng Zorro Antd
An enterprise-class UI components based on Ant Design and Angular. 🐜
Mustache.js
Minimal templating with {{mustaches}} in JavaScript
Superagent
Ajax with less suck - (and node.js HTTP client to match)
Bootstrap Table
An extended Bootstrap table with radio, checkbox, sort, pagination, and other added features. (supports twitter bootstrap v2 and v3)
Flux
Application Architecture for Building User Interfaces
Bootstrap Datepicker
A datepicker for @twitter bootstrap forked from Stefan Petre's (of eyecon.ro), improvements by @eternicode
Selectize.js
Selectize is the hybrid of a textbox and <select> box. It's jQuery based and it has autocomplete and native-feeling keyboard navigation; useful for tagging, contact lists, etc.
Rx Js
The Reactive Extensions for JavaScript
React Intl
Internationalize React apps. This library provides React components and an API to format dates, numbers, and strings, including pluralization and handling translations.
Grapesjs
Free and Open source Web Builder Framework. Next generation tool for building templates without coding
Tinymce
TinyMCE is a JavaScript library for platform independent 'WYSIWYG' or rich text editing. It is released as open source under the LGPL.
Polymer
Leverage the future of the web platform today.