https://www.diamond-visions-sarl.com/page/services/lepton-cms-add-ons/auto-gallery.php

This module creates an easy to navigate photo gallery.

Features

•  Recursively searches through your photo file tree to automatically create the gallery using ImgBrowz0r by Frank Smit.
•  image thumbnails automatically created
•  image caching option
•  Light box style pop-up for viewing the photos using Pretty Photo by Stephane Caron.
•  Slide show option for lazy surfers.
•  Backend provides easy three click set up.
  1. choose the root of the photo folders.
  2. choose the cache folder.
  3. click save.
• plupload
• If you have edit permission for the page you can drag and drop files to add to the gallery you are currently in.