Можно просто поискать описание модулей:
$ grep "docs.jquery.com" jquery-ui-1.8.13.custom.min.js
* http://docs.jquery.com/UI
* http://docs.jquery.com/UI/Widget
* http://docs.jquery.com/UI/Mouse
* http://docs.jquery.com/UI/Position
* http://docs.jquery.com/UI/Draggables
* http://docs.jquery.com/UI/Droppables
* http://docs.jquery.com/UI/Resizables
* http://docs.jquery.com/UI/Selectables
* http://docs.jquery.com/UI/Sortables
* http://docs.jquery.com/UI/Accordion
* http://docs.jquery.com/UI/Autocomplete
* http://docs.jquery.com/UI/Button
* http://docs.jquery.com/UI/Dialog
* http://docs.jquery.com/UI/Slider
* http://docs.jquery.com/UI/Tabs
* http://docs.jquery.com/UI/Datepicker
* http://docs.jquery.com/UI/Progressbar
* http://docs.jquery.com/UI/Effects/
* http://docs.jquery.com/UI/Effects/Blind
* http://docs.jquery.com/UI/Effects/Bounce
* http://docs.jquery.com/UI/Effects/Clip
* http://docs.jquery.com/UI/Effects/Drop
* http://docs.jquery.com/UI/Effects/Explode
* http://docs.jquery.com/UI/Effects/Fade
* http://docs.jquery.com/UI/Effects/Fold
* http://docs.jquery.com/UI/Effects/Highlight
* http://docs.jquery.com/UI/Effects/Pulsate
* http://docs.jquery.com/UI/Effects/Scale
* http://docs.jquery.com/UI/Effects/Shake
* http://docs.jquery.com/UI/Effects/Slide
* http://docs.jquery.com/UI/Effects/Transfer
