The user interface of Liferay CMS consists of Portal that contain UI elements. The UI element is a page or a part of the page that contains CMS that is shown to the end user. The UI Personalization is available to extend to the UI elements like Menu,Tabs,forms,text and group of controls etc. There is lot’s of framework available in the market to customize your UI of Application. AlloyUI is one of the UI frame which is developed on top of the YUI3 that offers an easy API for constructing high scalable applications. It’s maintained by liferay engineers. When you develop component using AlloyUI scripts in the portal, you can reuse them anywhere else.