Redmine

I think you need to add a root project, visible only in the administration part of the UI, to the top of the project tree in Redmine. Or any similar solution.

Otherwise there is no place to assign privileges (using roles) to new users, because new users are not yet part of any project.

Case in question: adding a bunch of users and give them the privilege to create projects (:add_project).

Doesn't work right now, a workaround is to give all users admin rights until they have created their first project, which is not so nice..