Art Pretty Photo - Joomla! extension to display images/galleries/videos/external pages/Flickr/Picasa in pretty highly customizable popup window.

Artetics.com demo site

Art PrettyPhoto is Joomla! extension to display various content in pretty popup

Features:

Can display single images, image galleries, videos (youtube), external pages
Can display images from Flickr feed: {artprettyphoto flickr="FLICKR_USER" /}
Can display images from Flickr photo set: {artprettyphoto flickrApiKey="FLICKR_API_KEY" flickrNumberOfImages="25" flickr="FLICKR_USER" flickrSet="FLICKR_PHOTO_SET" flickrImageSize="o" /}. More information: How to get Flickr API key. How to find photo set id
Can display Picasa album: {artprettyphoto picasaUser="PICASA_USER" picasaAlbum="PICASA_ALBUM"/}. Demo
Several configurable options: animation speed, allow resize, show title, etc.
5 themes: light rounded or light square, dark rounded or dark square, facebook-style theme
Supports multiple galleries on the page
Easy to use plugin code for galleries: {artprettyphoto path="path_to_images_folder"/}
Easy to use plugin code for single images: {artprettyphoto padding="40" opacity="0.35" animationSpeed="normal" showTitle="1" allowresize="1" counter_separator_label="/" theme="dark_rounded" noConflict="1" /} where
- padding - Padding for each side of the picture. Example: 40
- opacity - Popup opacity. Values: between 0 and 1
- showTitle - Display title or not. Values: 1 (yes), 0 (no)
- allowresize - Allow image resize or not. Values: 1 (yes), 0 (no)
- animationSpeed - Speed of popup anumation. Values: slow, normal, fast
- counter_separator_label - Label for counter separator, ex: 1 of 5
- theme - Popup theme. Values: light_rounded, dark_rounded, light_square, dark_square, facebook
- noConflict - JQuery noconflict. JQuery and mootools javascript libraries may conflict. Set this to true if you are using mootools library on the page. Values: 1 (yes), 0 (no)

Demo [Images]:

Demo [Gallery]: - plugin code: {artprettyphoto theme="facebook" path="images" /}

Demo [External Content]:
Google

Once plugin code is placed in your article you can add popup functionality to any image, youtube video, flash or external page:

Image: <a href="/images/fullscreen/1.jpg" rel="prettyPhoto" title="Description"><img src="/images1.jpg" alt="Picture 1 title" /></a>
Youtube video: <a href="http://www.youtube.com/watch?v=test" rel="prettyPhoto[flash]" title=""><img src="/images/logo.png" alt="YouTube" width="60" /></a>
Flash: <a href="http://test.com/test.swf?width=580&height=326&" rel="prettyPhoto[flash]" title="Test movie"><img src="/images/logo.png" width="60" alt="Test movie" /></a>
External page: <a href="http://www.google.com?iframe=true&width=600&height=300" rel="prettyPhoto[iframes]">Google.com</a>