Sails.js - Realtime MVC Framework for Node.js

Sails.js is a web framework that makes it easy to build custom, enterprise-grade Node.js apps. It is designed to resemble the MVC architecture from frameworks like Ruby on Rails, but with support for the more modern, data-oriented style of web app development. It's especially good for building realtime features like chat.

Sails actions are compatible with Connect middleware, so in most cases, you can paste code into Sails from an existing Express project and everything will work-- plus you'll be able to use WebSockets to talk to your API, and vice versa. Sails translates incoming socket messages for you, they're automatically compatible with every route in your Sails app.