Please recommend a good Photo Web Site Engine

Could anybody recommend a more or less acceptable engine (application,
program, platform) to create a professionally looking photo web site? I'm
pretty sure that there are many different applications generating pages,
automatically inserting thousands of images of different resolutions, maybe
even automatically rescaling images, using JS for transition effects, having
and supporting different styles, allowing the owner to add the descriptions
to the photos, gathering comments from the users, register users, etc., and
at the same time absolutely simple to let the searching machines read and
index the entire site, going through all the links and references page by
page? Does anybody have any good examples of these sites with the references
to the application created these sites?

I'm not expecting that I should write the site from scratch myself, on the
other hand it will take a very long time to write something good enough for
publishing.

Any help will be appreciated!

Thanks,
Just D.