Most Useful Modal Window Plugins for jQuery

prettyPhoto is a jQuery based lightbox clone. Not only does it support images, it also add support for videos, flash, YouTube, iFrames. It’s a full blown media lightbox.

Only 1.2kb using the jQuery library

demo:
http://orderedlist.com/demos/fancy-zoom-jquery/

An overlay popup script for easily embedding flash video, displaying images, or showing html

TopUp is an easy to use Javascript library for unobtrusively displaying images and webpages in a Web 2.0 approach of popups.

jQuery BigPicture is an unobtrusive plugin designed to display images in a modal window along with a full description.

A light-weight, customizable lightbox plugin for jQuery 1.3

A dialog is a floating window that contains a title bar and a content area. The dialog window can be moved, resized and closed with the 'x' icon by default.

FancyBox is a tool for displaying images, html content and multi-media in a Mac-style "lightbox" that floats overtop of web page.

SimpleModal is a lightweight jQuery plugin that provides a simple interface to create a modal dialog.

jqModal is a plugin for jQuery to help you display notices, dialogs, and modal windows in a web browser. It is flexible and tiny, akin to a "Swiss Army Knife", and makes a great base as a general purpose windowing framework.

The jQuery BlockUI Plugin lets you simulate synchronous behavior when using AJAX, without locking the browser. When activated, it will prevent user activity with the page (or part of the page) until it is deactivated.

ThickBox is a webpage UI dialog widget written in JavaScript on top of the jQuery library. Its function is to show a single image, multiple images, inline content, iframed content, or content served through AJAX in a hybrid modal.

nyroModal is a highly customizable modal window plugin.
You'll be able to customize either the look by CSS and the animation by creating your own, using the jQuery animation function.

jQuery lightBox plugin is simple, elegant, unobtrusive, no need extra markup and is used to overlay images on the current page through the power and flexibility of jQuery´s selector.

Facebox is a jQuery-based, Facebook-style lightbox which can display images, divs, or entire remote pages.
It's simple to use and easy on the eyes. Download the tarball, view the examples, then start enjoying the curves.

A modification of jQuery lightBox plugin.

jQuery Simple Dialog is a lightweight jQuery plugin that provides a simple interface to create a modal dialog.