jQuery RS Modal is a tried and tested modal plugin with a full but simple API.
modalBox.js is a very light weight modal window plugin packed with only most used features and options. Its overall size is around 5.3 kb ( 2.5 kb minified). Core of plugin is completly explained in homepage, so you can easily extend it according to your need.
jQuery plugin for creating stackable modal boxes.
A JQuery plugin to open a Bootstrap modal (dialog) with content loaded via Ajax.
A jQuery humanized message plugin is a way to neatly overlay alerts and message for users using your app. You can position your messages on any part of the screen and they will neatly fade in and out with any color and time delay you like.
The Message box for web, Firefox style, User notification made simple.
A lookup dialog widget based on the dialog and autocomplete widgets from jQuery UI.
A simple plugin for visual selection of colors via a discrete hexagonal color picker using hsl or hsv mapping.
MultiDialog utilizes jQuery UI Dialog Widget for a full featured Modalbox / Lightbox application.
jQuery UI widget for displaying a feedback dialog on your site.