http://photogallerycreator.com/
works with XML file and you can have source code for free.
here are some demos:
http://photogallerycreator.com/gallery_1/
http://photogallerycreator.com/video_gallery_light/
http://photogallerycreator.com/flagallery-demo/?skin=stylishgrey/stylishgrey.php