What are some alternatives?
Piwigo - The default home page of a Piwigo photo gallery is the list of root albums. If it doesn't fit your need, you can create your own customized home page. There are 2 main methods: either you create an additional page or your create dynamic blocks.
Lychee - Lychee is an open-source, free software program for self-hosted photo management. It can be installed on the user's own server or website. The software permits the uploading and management of photos and also makes sharing photos very easy.
MediaGoblin - MediaGoblin is a free software media publishing platform that anyone can run.
Flickr - image and video hosting website
Koken.me - Koken is a free web site publishing system developed for photographers, designers, artists and...
Imgur - Imgur is a free and simple image hosting service with image editing feature. Signup is optional.