ExpressJS - Sinatra inspired web development framework for node.js -- insanely fast, flexible, and simple
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.
Ractive.js - Ractive.js is different.
server.js - A modern, powerful server for Node.js