Install planner by entering the following commands in the terminal:
sudo apt update sudo apt install planner
Description:
project management application
Planner is a Project Management application that supports Gantt charts, resource allocation and integration with other GNOME applications. . Planner was formerly known as Mr.Project.
Homepage: http://live.gnome.org/Planner
Version: 0.14.6-5
Section: universe/gnome