NO LONGER SUPPORTED HERE, SEE
See the new EvoGallery repository here
A self-updating, caching Dropbox gallery for your website. Customizable, too!
Manage your photos with Piwigo, a full featured open source photo gallery application for the web...
Escape NextGen Gallery
Powerful and easy to use cms to build websites, blogs or ecommerce stores.
Official repository for the Cleaner Gallery WordPress plugin.
Wordpress Gallery3 Plugin
Fotorama picture galleries for CMSimple_XH
A Gallery add-on for MODx Revolution.
Automatic image galleries of whole folders