Prototype UI: Prototype UI is a javascript library based on Prototype 1.6 and Script.aculo.us. It's an extensive and fast growing library of UI components which can be used in complex web applications. Currently, Prototype UI provides such modules as Carousel, Modal window, Shadow and Context menu which can be used as one package or independently.”[Scripteka is collection of prototype.j extensions and libs. Excellent.]
Source: Scripteka