SimpleGal is a free, open-source gallery system written in PHP.
SimpleGal installs in seconds, then lets you get straight onto creating folders for albums and upload images via FTP or the handy web interface.
Extend SimpleGal with plugins to add functionality, and install or create your own themes to fully customise the appearance of your gallery.
An efficient design plus an intelligent caching system mean that your gallery is always lightning-fast.
SimpleGal is developed by Rob Miller.
SimpleGal is completely open-source; it’s distributed under the GPL, so you’re perfectly free to modify it, mercilessly edit it, hack it to pieces and even distribute your modified version.