2. iUI: iPhone User Interface Framework
Is a feature rich UI frameworks, built on YUI 3 and to some degree on YUI 2, that comprises a wide array of components – more than 60 in all – that range from utilities to sugar layers to full-blown UI widgets. Its contols include: Image Gallery, Dialog, Treeview, Panel, AutoComplete, Button, Calendar, Toolbar… and much more.
Is still under development but is showing some very promising stuff in its roadmap. It has been built on Prototype and Scriptaculous libraries and features a growl-like user messaging system, color picker (based on raphaël), slider, tooltip system, draggable window and alert / confirm / prompt windowing systems.
5. Prototype UI
6. jQuery UI
7. jQuery TOOLS – The missing UI library for the Web
jQuery Tools is a very light weight (2.5kb) collection of the most popular user-interface components that offers functionality over load time. It provides libraries for the following jQuery elements: Tabs, Tooltip, Scrollable, Overlay, Forms and Flashembed.
8. Dijit – The Dojo Toolkit
9. JxLib based MooTools
10. Sigma Ajax UI Builder