Some of the features of PHPictureAlbum are:

• Optimise Jpegs on the fly.
• Multiple templates
• Mysql or Postgresql
• User editable categories
• Automatically creates thumbnails.
• Users can password protect chosen categories
• Random images displayed on main page, users define if photos are to be inlcuded.
• Multiple users, family members or friends with a digital camera or scanner can have control over their own gallery.
• Centralised admin, allows you to see total diskspace used by photos, total number of photos and photo upload traffic (requires jpgraph).
• And much much more...