Wacko Wiki is a light and handy Wiki-engine.
Zenphoto is a standalone gallery CMS that just makes sense and doesn't try to do everything and your dishes.
Omeka is a free, flexible, and open source web-publishing platform for the display of library, museum, archives, and scholarly collections and exhibitions.
Piwigo is a photo gallery software for the web that comes with powerful features to publish and manage your collection of pictures.
Network traffic monitor that tracks incoming and outgoing bandwidth usage by hour, by day, etc.
Calendar application that can be configured as single, multi-user calendar, or as an event calendar viewable by visitors.