Batman.js is a framework for building rich single-page browser applications. It is written in CoffeeScript and its API is developed with CoffeeScript in mind, but of course you can use plain old JavaScript too.

It got a stateful MVC architecture, a powerful binding system, routable controller actions, pure HTML views, toolchain support built on node.js and cake. The APIs are heavily inspired by Rails and designed to make Rails devs feel right at home. It has been tested on Chrome, Safari 4+, Firefox 3+, and IE 7+ for compatibility.

Requirements: -
Demo: http://batmanjs.org/
License: MIT License