I am not sold on the templating library either. But the Closure library is quite extensive and abstract. It contains tons of useful (and well designed) UI compo

I am not sold on the templating library either. But the Closure library is quite extensive and abstract. It contains tons of useful (and well designed) UI components and compares favorably to something like jQuery UI. On the other hand there is a higher barrier of entry due to the lack of adequate documentation.