Q:

Where can I download a non-minified version of jQuery UI?

I'm trying to customize the autocomplete combobox
with the intent of using it for nested lists with flyouts. Starting this with the minified version of jQuery UI is obviously not ideal. The download builder only provides minified downloads.

A:

Look within your standard downloaded zip from jqueryui.com/download, there is a folder:
development-bundle/ui

within that folder, you have everything you need, in non-minimized format. :) You don't need to look any further..

A:

For jQuery UI: 

You can get the latest source right from github here 
For the full combined release of jquery-ui.js, grab it from Google's CDN

For jQuery Core: 

Same goes for jQuery core 
And the CDN/combined version

