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