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http://rad-dev.org/lithium

Lithium/Wiki/home

Lithium is currently in dev release status, and is under active development on several fronts. To learn more about where we're headed, or to get the latest updates on our progress, you can check the blog or the roadmap . Getting help Since Lithium is a brand new project, we're asking for peoples' patience as we get our support channels worked out. While you're waiting, you can come chat with us any time on Freenode at #li3 for general questions, or #li3-core if you're interested in developing Lithium's internals or core plugins.
Yii comes with rich features : MVC, DAO/ActiveRecord, I18N/L10N, caching, authentication and role-based access control, scaffolding, testing, etc. It can reduce your development time significantly. http://www.yiiframework.com/

Yii PHP Framework: Best for Web 2.0 Development

CodeIgniter - Open source PHP web application framework

http://codeigniter.com/ Welcome to CodeIgniter! CodeIgniter is a powerful PHP framework with a very small footprint, built for PHP coders who need a simple and elegant toolkit to create full-featured web applications. If you're a developer who lives in the real world of shared hosting accounts and clients with deadlines, and if you're tired of ponderously large and thoroughly undocumented frameworks
The Anim Utility provides the ability to animate changes to style properties. Advanced easing equations are provided for more interesting animated effects. NOTE: Depending on which features are required, you may want to consider using the Transition Utility as an alternative to Anim. The Transition Utility isn't as feature rich as Anim, but it leverages native CSS Transitions when possible, provides a smaller payload, and can be hardware-accelerated. Next, create a new YUI instance for your application and populate it with the modules you need by specifying them as arguments to the YUI().use() method. YUI will automatically load any dependencies required by the modules you specify.

YUI Library Examples: Animation

http://yuilibrary.com/yui/docs/anim/index.html