HomePage: https://jqueryui.com

Interactions
    Draggable
    Droppable
    Resizable
    Selectable
    Sortable

Widgets
    Accordion
    Autocomplete
    Button
    Datepicker
    Dialog
    Menu
    Progressbar
    Slider
    Spinner
    Tabs
    Tooltip

Effects
    Add Class
    Color Animation
    Effect
    Hide
    Remove Class
    Show
    Switch Class
    Toggle
    Toggle Class

Utilities
    Position
    Widget Factory