Chosen

Chosen is a JavaScript plugin that makes long, unwieldy select boxes much more user-friendly. It is currently available in both jQuery and Prototype flavors.

jQuery File Upload – jQuery UI version

File Upload widget with multiple file selection, drag&drop support, progress bars and preview images for jQuery. Supports cross-domain, chunked and resumable file uploads and client-side image resizing. Works with any server-side platform (PHP, Python, Ruby on Rails, Java, Node.js, Go etc.) that supports standard HTML form file uploads.

jQuery UI Slider

Displays a flexible slider with ranges and accessibility via keyboard.

jQuery UI Autocomplete

Lists suggested words as the user is typing.

jQuery UI Widget

Provides a factory for creating stateful widgets with a common API.

jQuery UI Selectmenu

Duplicates and extends the functionality of a native HTML select element, allowing it to be customizable in behavior and appearance far beyond the limitations of a native select.

jQuery UI Progressbar

Displays a status indicator for loading state, standard percentage, and other progress indicators.

jQuery UI Droppable

Enables drop targets for draggable elements.

jQuery UI Shake Effect

Shakes an element horizontally or vertically n times.