Usermin is a web-based interface for webmail, password changing, mail filters, fetchmail and much more.
ownCloud provides universal access to files via a browser or WebDAV. Easily view and sync your contacts, calendars and bookmarks across all your devices and enables basic editing.
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.