An awesome way to show quick information to your users is to use jQuery modal dialog boxes or windows.
Many frameworks, such as Bootstrap or Zurb Foundation includes modals and dialogs. However, if all you want is a great looking, easy to use modal window without designing it from scratch, there are plenty of libraries out there to help you.
Modaal is Web Content Accessibility Guidelines 2.0 based modal window plugin. This plugin is developed with UX in mind, this plugin has a lot of advanced features like full-screen window and keyboard controls.
animatedModal.js is a jQuery plugin to create a fullscreen modal with CSS3 transitions. You can use the transitions from animate.css or create your own transitions.
Avgrund is a jQuery plugin for your modal boxes and popups. It uses new concept showing depth between popup and page.It works in all modern browsers and gracefully degrade in those that do not support CSS transitions and transformations.
The aim of this library is to make modal dialogs accessible and easy to include in your project with minimum configuration. It’s only ~1.8kb minified and gzipped – A tiny library for big change.
Responsive, lightweight, fast, synchronized with CSS animations, fully customisable modal window plugin with declarative configuration and hash tracking.
Just another responsive jQuery modal window plugin that also suitable for images, inline contents, iFrames, Google Maps, Vimeo and YouTube videos. The big difference compared to many others plugins like this is that VenoBox calculates the max width of the image displayed and preserves its height if is taller than the window (so in small devices you can scroll down the content, avoiding vertical microscopic resized images).