AlloyUI - A Framework Built On Top Of YUI3 For Building Highly Scalable Applications

AlloyUI is a UI framework built on top of YUI3 that provides a simple API for building high scalable applications.  It is a UI metaframework that provides a consistent and simple API for building web applications across all three levels of the browser: structure, style and behavior.

It incorporates three design languages: HTML, CSS, and JavaScript. The thing is, DOM manipulation is just the top of the iceberg when you are talking about modern and high scalable applications.

You'll probably need another library for templating (like Mustache/Handlebars), another for modular loading (like RequireJS/HeadJS), another for MVC structuring (like Backbone/Ember), another for UI components (like jQueryUI/ExtJS) and so on.

Well, AlloyUI comes with all of those things together. So there's no mess between different libraries, just a uniform API that make your life easier. It's mantained by highly qualified engineers of Liferay and it's built on top of YUI3, another awesome project made by Yahoo.

Requirements: YUI3
Demo: http://liferay.github.com/alloyui.com/examples/
License: BSD

Mojito - An MVC Application Framework Built On YUI3 For Agile Development Of Web Applications

Mojito is an MVC application framework built on YUI 3 that enables agile development of Web applications. Mojito allows developers to write client and server components in the same language (JavaScript), using the same framework. Because Mojito applications are written in JavaScript, they can run on the client (in the browser) and on the server (with Node.js). In addition, Mojito has built-in support for internationalization, testing, and building documentation.


Requirements: YUI 3
Demo: http://developer.yahoo.com/cocktails/mojito/docs/code_exs/
License: BSD License