GreyBox from Orangoo Labs is the best general purpose Lightbox implementation I have found to date. GreyBox allows you to display websites, images and other content in a modal window. It’s not a program like Visual LightBox JS where you drag and drop photos into the Visual LightBox window, press “Publish” and a Web gallery is generated. However, Greybox is easy to set up, it’s small (only 22KB), and it’s styled in CSS so it’s easy to customize. GreyBox is free, and you can get more information and download GreyBox here.