Raphaël : Raphaël is a small JavaScript library that should simplify your work with vector graphics on the web. If you want to create your own specific chart or...
howler.js : howler.js is an audio library for the modern web. It defaults to Web Audio API and falls back to HTML5 Audio.
Prototype : Easy Ajax and DOM manipulation for dynamic web applications
Slate : Slate is a completely customizable framework for building rich text editors.
Slate lets you build rich, intuitive editors like those in Medium, Dropbo...
rsvp.js : A lightweight library that provides tools for organizing asynchronous code
In-browser structured text editing component. A toolkit for building rich-text editors on the web.