SPROUTCORE

SproutCore is a framework for building applications in JavaScript with remarkably little amounts of code. It can help you build full "thick" client applications in the web browser that can create and modify data, often completely independent of your web server, communicating with your server via Ajax only when they need to save or load data. JavaScript applications are faster, easier to use, and a lot easier to write than complicated Ajax-driven applications. When you use a framework like SproutCore to help you, they can also be a lot of fun to write.