Lots of people learn better by example, than by lecture. Here is a heavily commented piece of widget code that can get you headed in the right direction. Think of this post as the homework worksheet that goes with my post from yesterday about jQuery widgets.

MultiSelect progessively enhances an ordinary multiple select control into elegant drop down list of checkboxes, stylable with ThemeRoller.

This document explains how to use the jQuery UI Widget Factory.

Wikipage of the jQuery UI Widget Factory.

A progressive enhancement to <select multiple> form elements. It provides a simpler alternative based on JavaScript (jQuery).

Another attempt of a sortable, searchable multiple select widget.

A standard HTML multiple Select menu allows the user to select multiple options using Command-Click. But when the list of options is long, requiring the user to scroll, it becomes cumbersome and prone to errors.

An effective solution is to use two select menus in tandem, with buttons allowing options to be swapped between the two.

Tandem Select implements this as a jQuery Plugin - simple to set up and easy to customize.

Tokeninput is a jQuery plugin which allows your users to select multiple items from a predefined list, using autocompletion as they type to find each item. You may have seen a similar type of text entry when filling in the recipients field sending messages on facebook.

Article that demonstrates a simple “perfect” Javascript plugin pattern that allows for extendable, organized, destroyable, and deterministic widgets.

This is awesome => Wijmo Open Source jQuery UI widgets are now available on github #jqcon

Article that explains the widget infrastructure of jQuery UI.

A very nice self-contained JS-Datepicker component (no library needed). Not free, license needed.

Skript, das mehrere Autocomplete-Flyouts in einem Feld ermöglicht.

Uki is a fast and simple JavaScript user interface toolkit for desktop-like web applications. It comes with a rich view-component library ranging from Slider to List and SplitPane.