Dropzone.js : DropzoneJS is an open source library that provides drag'n'drop file uploads with image previews.
JSDB.io : JSDB is a collection of the best javascript libraries
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...
script.aculo.us : script.aculo.us provides you with
easy-to-use, cross-browser user
interface JavaScript libraries to make
your web sites and web applications fly.
Tracery : A story-grammar generation library for javascript. Write grammar objects, get generative stories.