Sortable Fancybox Gallery

aka galerie

An image gallery that displays all of the images in a particular fileset as a series of thumbnails. You can optionally enable a lightbox effect (the “Fancybox”) so that the images zoom out when clicked. The size of the thumbnails and the zoomed images are configurable, as well as the number of columns to display the images in. You can also change the lightbox zooming effect and the placement of captions.

In addition, the editing interface for this block gives you the ability to rearrange the fileset images using “drag and drop” so that they can be displayed in any order you wish.

http://www.concrete5.org/marketplace/addons/sortable-fancybox-gallery/