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 Drop Effect

Moves an element in one direction and hides it at the same time.

jQuery UI Menu

Creates nestable menus.

jQuery UI Resizable

Enables resize functionality for any element.

jQuery UI Explode Effect

Explodes an element in all directions into n pieces. Implodes an element to its original wholeness.

jQuery UI Mouse

Abstracts mouse-based interactions to assist in creating certain widgets.

jQuery UI Core

The core of jQuery UI, required for all interactions and widgets.

jQuery UI Bounce Effect

Bounces an element horizontally or vertically n times.

jQuery UI Effects Core

Extends the internal jQuery effects. Includes morphing and easing. Required by all other effects.