Piwigo

Piwigo is a photo gallery software for the web that comes with powerful features to publish and manage your collection of pictures.

Features:

• Privacy on your Photos. Make your photos private and decide who can see each of them. You can set permissions on albums and photos, for groups or individual users.
• Photo Tagging. Offer your visitors another way to browse your photos, starting from the tags cloud and using multiple related tags to reduce the selection.
• Browse by Date. Digital cameras store the date in the photo and Piwigo uses this date to display your photo collection in a calendar and let you browse from day to day.
• Statistics and Management Tools. Administrators can browse history, process photos in batch mode, validate comments and user photos, add permalinks or manage remote servers.
• Themes and Plugins. Change appearance with themes. Add features with plugins. Extensions require just a few clicks to get installed. 350 extensions available, and growing!