Flexible Ajax Image Gallery: Imago
Imago is an Ajax image gallery built with MooTools.
This gallery has connectors for Flickr, SmugMug & SimpleViewer to call images from them or use their XML files.
Imago is fully customizable with CSS & very easy to use.
A detailed "how to use" information guides you on setting up your Ajax image gallery.
Compatibility: Flickr, SimpleViewer, SmugMug or hosted images.