Product history:

With Scrumix you can create and modify projects, administer project permissions, view reports, view all task statuses, create milestones, as well as to view all task types and priorities. It is a web-based application that runs on top of a web server, such as Apache.

This is the server version of the Scrumix project, especially designed for Linux operating systems, and can be used freely without any licenses. Also, keep in mind that all currently available plugins, including TaskBoard, are BSD licensed and can be freely redistributed and modified.