Lightbox JS

Web site: www.huddletogether.com/projects/lightbox/

License: Creative Commons Attribution 2.5

This is an unobtrusive JavaScript library that makes it easy to overlay images on the current page. It is used on many sites to show the larger images of thumbnails within articles. To use it, you simply need to include the library and add rel="lightlight" attributes to an a href that links to the image you want to overlay.