ExpressJS - Sinatra inspired web development framework for node.js -- insanely fast, flexible, and simple
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.
Backbone.js - Give your JS App some Backbone with Models, Views, Collections, and Events
Chart.js - Easy, object oriented client side graphs for designers and developers.
FeathersJS - Wow your users. Build incredible real-time applications in record time.
Chartist.js - Chartist.JS - simple responsive charts.