phpgroupware.org

phpgroupware.org: "phpGroupWare

[pcs - this is linked from the dotGNU project, which is a good sign!]

phpGroupWare - formerly known as webdistro - is a multi-user groupware suite written in PHP.

It provides about 50 web-based applications, as there are the Calendar, Addressbook, an advanced Projects manager, Todo List, Notes, Email, Newsgroup- and Headlines Reader, a Filemanager and many more Applications. The calendar supports repeating events and includes alarm functions. The email system supports inline graphics and file attachments.

The system as a whole supports user preferences, themes, user permissions, multi-language support and unser groups. It includes modules to setup and administrate the working environment. The groupware suite is based on an advanced Application Programming Interface (API)."