ChiliProject

​https://www.chiliproject.org

ChiliProject is a web based project management system. It supports your team throughout the complete project life cycle, from setting up and discussing a project plan, over tracking issues and reporting work progress to collaboratively sharing knowledge.

Sounds familiar, no?

The ChiliProject started in 2011 as a fork of RedMine, but the ​project has ended in February 2015.

It has a nice ​Ideas page where there's a thing or two to borrow ;-)