[Davertron]

JQuery isn't designed for building applications, it's main purpose is making cross-browser interaction with the DOM easier. It has some other "utililty" type functions, like making cross-browser AJAX simpler and adding its own "each" looping construct, etc. etc. But the simple answer to your question is that this is not a replacement for jQuery.

I don't know much about Enyo, but it looks to be more of a framework for building applications, and provides things like layout management, controls, and an interesting "Component" model. I know that it was extracted from WebOS, so it may have some overlap with JQuery (i.e. by providing simpler methods of interacting with the DOM) but its goal is different.

[micheljansen]

I think he/she is referring to jQuery UI and/or jQuery Mobile. Like Enyo, those do contain user interface elements and widgets. See this for example: http://jquerymobile.com/test/docs/forms/forms-all.html