jQuery Enhanced Lightbox
The Enhanced Lightbox is a jQuery plugin that allows designers and developers to overlay single images and/or image collections in a webpage, using very little extra markup.
This plugin is an extension of Leandro Vieira's jQuery Lightbox, to which I added a few features I wanted, like the ability to add titles and descriptions to each image (using HTML5 data-* attributes), the option to fit large images to the browser window, and better lightbox positioning. I used these features quite a lot in this website, check for instance the Design Scrapbook.
I hope you find it useful. Enjoy!