Draggable : Draggable is a modular drag & drop library, allowing you to start small and build up with the features you need. At its most basic, Draggable gives yo...
Bliss.js : Want to use Vanilla JS but find native APIs a bit unwieldy? Bliss is for you
PeerJS : Peer-to-peer data in the web browser.
PeerJS completes WebRTC as an API abstraction, connection broker, and binary serialization format
meSpeak.js : meSpeak.js (modulary enhanced speak.js) is a 100% client-side JavaScript text-to-speech library
Prototype : Easy Ajax and DOM manipulation for dynamic web applications
DropzoneJS is an open source library that provides drag'n'drop file uploads with image previews.