TiltViewer is a free 3D Flash image viewer application with an impressive interface.

The application responds to the mouse movements and creates a full 3D effect with new image sets falling, old ones disappearing, zooming an image and flipping it to see the details.

3D Flash Image Viewer

Images can be added to the gallery from a XML file or a flickr account.

TiltViewer comes with 2 versions. A free version with a "TiltViewer" link and a Pro version which is paid with no links and more customization options.

P.S. This flash gallery is built with Away3D,  a realtime 3D engine for Flash.