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...
Workbox : JavaScript Libraries for adding offline support to web apps.
DOMAssistant : The modular lightweight JavaScript library, with CSS selectors, event handling, AJAX and complete Unicode support
polyfill : polyfill makes web development less frustrating by selectively polyfilling just what the browser needs. Use it on your own site, or as a service.
Tracery : A story-grammar generation library for javascript. Write grammar objects, get generative stories.
A library to generate PDFs in client-side JavaScript.