NLP.js - An NLP library for building bots, with entity extraction, sentiment analysis, automatic language identify, and so more - axa-group/nlp.js
D3.js - D3.js is a JavaScript library for manipulating documents based on data. D3 helps you bring data to life using HTML, SVG, and CSS.
jQuery - The Write Less, Do More, JavaScript Library.
Chart.js - Easy, object oriented client side graphs for designers and developers.
MooTools - MooTools (My Object-Oriented Tools) is a lightweight, object-oriented, web-application framework...
Google Charts - Interactive charts for browsers and mobile devices.