Simple Viewer is a cool way to add a professional flash image viewer to your web site.
http://www.wysiwygwebbuilder.com/simpleviewer.html
(free for registered users)
Postcard Viewer is a flash image viewer based on the real world metaphor of a set of postcards shuffled onto a surface.
http://www.wysiwygwebbuilder.com/postcardviewer.html
(free for registered users)