Durandal is a lightweight JavaScript framework designed to make building Single Page Applications (SPAs) simple and elegant. It has strong support for MVC, MVP and MVVM so that no matter what type of front end architecture you prefer, Durandal can handle the task.
With RequireJS as its base and a thin layer of conventions, Durandal can provide amazing productivity while helping you to maintain SOLID coding practices. Pair that with out-of-the-box support for rich UI composition, modal dialogs, eventing/messaging, widgets, transitions, routing and more....and there's no doubt you'll be able to build whatever apps you can imagine.