It is a free photo gallery written in PHP. This script inspired by simplicity of brilliant MySQL client Adminer from Jakub Vrána. It is completely in only one file. It is very simple to upload it anywhere to hosting and use it in a few seconds. And why don't use this idea for web photo gallery?
Subalbums are not distinguishable from basic photos in album. There should be some type of overlay icon like that in locked albums.