Ember.js : A JavaScript framework for creating ambitious web applications
Workbox : JavaScript Libraries for adding offline support to web apps.
howler.js : howler.js is an audio library for the modern web. It defaults to Web Audio API and falls back to HTML5 Audio. This makes working with audio in JavaScr...
Mousetrap : A simple library for handling keyboard shortcuts in Javascript.
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