Sails.js is a server-side Web framework that sits on top of Node.js. It is thus built in JavaScript, allowing you to use the same event-oriented architecture in the browser and on your server.  In this talk, Mike Hostetler introduces it to Web developers, demonstrating its power and scalability,  its MVC structure, and the Waterline ORM.  If you want to work in JavaScript on the server, but find Node.js to be too low level, then this talk can introduce you to Sails.js.