OrangeHRM offers a complete suite of human capital management / human resource management tools.
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.