Multi-server : PhpWebGallery can use several different server to store pictures for the same gallery.
unlimited number of levels for categories. You can place as many sub-categories levels as you wish.
Users comments under each picture displayed as a forum topic.
Search (simple, but will be improved for next version)
Favorites : registered users can access to a “favorites” section containing the pictures they chose as their favorites.
Mail-address generator : you can generate a address mail for all the registered users of your site knowing each mail-address. You can then use your usual mail client.
Restriction access by category (in addition to restriction access by user)