Grunt
Grunt: The JavaScript Task Runner
Fastclick
Polyfill to remove click delays on browsers with touch UIs
Scroll Reveal.js
Declarative on-scroll reveal animations.
Signal R
Incredibly simple real-time web for .NET
Mediaelement
HTML5 <audio> or <video> player with Flash and Silverlight shims that mimics the HTML5 MediaElement API, enabling a consistent UI in all browsers.
Velocity
Accelerated JavaScript animation.
Scroll Magic
The jQuery plugin for magical scroll interactions.
Remark
A simple, in-browser, markdown-driven slideshow tool.
Jszip
Create, read and edit .zip files with Javascript
Nprogress
For slim progress bars like on YouTube, Medium, etc
Bootstrap Datetimepicker
Date/time picker widget based on twitter bootstrap
UI Router
The de-facto solution to flexible routing with nested views
React Toastify
React notification made easy 🚀 !
Konva
Konva.js is an HTML5 Canvas JavaScript framework that extends the 2d context by enabling canvas interactivity for desktop and mobile applications.
Robotjs
Node.js Desktop Automation.
Bower
A package manager for the web, created at Twitter
Skrollr
Stand-alone parallax scrolling library for mobile (Android + iOS) and desktop. No jQuery. Just plain JavaScript (and some love).