It is FancyBox v.1.3.4 from fancyapps.com slightly patched for jQuery 2+ compatibility.
FancyBox is a tool for displaying images, html content and multi-media in a Mac-style "lightbox" that floats overtop of web page.
It was built using the jQuery library.
Licensed under both MIT and GPL licenses.
Original home page: http://fancybox.net/.
Patched by Valery Votintsev for jQuery 2+ compatibility.
- Can display images, HTML elements, SWF movies, Iframes and also Ajax requests
- Customizable through settings and CSS
- Groups related items and adds navigation.
- If the mouse wheel plugin is included in the page then FancyBox will respond to mouse wheel events as well
- Support fancy transitions by using easing plugin
- Adds a nice drop shadow under the zoomed item
Go to original home page for more info: http://fancybox.net/