planner
Planner Planner is an Office365 plan board to organize tasks which you can share with a team. Office365 offers Planner and Tasks (for individual task planning). There are various todo, task and project registration systems where one can implement a certain task or project management system like GTD or Scrum. Tools I like are org-mode, taskwarrior and taskjuggler. All are open source tools. The task files can sync across systems with a sync tool like syncthing....