Fancybox2 (http://fancyapps.com/fancybox/ http://fancyapps.com/fancybox/) is also responsive, though the site seems to be unresponsive (ha) at the moment. Iron

Fancybox2 (http://fancyapps.com/fancybox/ http://fancyapps.com/fancybox/) is also responsive, though the site seems to be unresponsive (ha) at the moment. Ironic that Fresco's actual page isn't responsive, I thought the overlay was adding huge scroll bars. Fancybox is also free, does other media (video, etc) & can group content. It's pretty easy to theme if you are not scared of CSS.