PicKLE is an image gallery system created in PHP, which generates thumbnails and resampled images on the fly and caches them. It is made to be extremely simple to install/configure. Comes packed with an example.

UberGallery is a PHP web image gallery. It is very easy to install, just add images to a folder, change settings in the config and that's it. Features of UberGallery:- Simple first time installation- Database-less configuration- Include galleries within pre-existing sites- Create multiple galleries with a single installation- Easily customize your gallery styles via CSS- Install and update the gallery ...