Is jQuery UI considered a jQuery Plugin?
Is it possible to use jQuery UI without jQuery?
Is jQuery UI considered a jQuery Plugin?
Is it possible to use jQuery UI without jQuery?
I would call it more of an extension to jQuery. It does use the core jQuery Library, which makes sense otherwise there would be 2 versions.
more info here: http://jqueryui.com/docs/Getting_Started
It is a series of plugins, and you don't have to add the whole thing if you dont want. You can download just what you need to save some page weight.
note: you do need the core to do anything