Underscore.js - A utility-belt library for JavaScript without extending any of the built-in JavaScript objects.
Backbone.js - Gives structure to web applications by providing models with key-value binding and custom events, collections with a rich API of enumerable functions, views with declarative event handling, and connects it all to your existing API over a RESTful JSON interface.
jQuery - A fast, concise, library that simplifies how to traverse HTML documents, handle events, perform animations, and add AJAX.
node.js - Event-driven I/O server-side JavaScript environment based on V8.
Express - High performance, high class web development for node.js.
Jade - High performance template engine heavily influenced by Haml and implemented with JavaScript for node.js.
Stylus - Expressive, dynamic, robust CSS for node.js
Mongoose - A MongoDB object modeling tool designed to work in an asynchronous environment.
MongoDB - A scalable, high-performance, open source NoSQL database.