RichFaces is a rich component library for JavaServer Faces built on an advanced open source framework (Ajax4jsf). It allows easy integration of AJAX capabilities into enterprise-level business application development. RichFaces enriches the Ajax4jsf framework in two important ways. First, it expands the number of visual ready-to-use components. Secondly, it fully implements the skinability feature of the Ajax4jsf framework including a large number of predefined skins. Using skinability, it is much easier to manage the look-and-feel of an application.