GNOME has an app called Planner: https://wiki.gnome.org/Apps/Planner https://wiki.gnome.org/Apps/Planner Planner is packaged in many distros, e.g.: - https:/

GNOME has an app called Planner: https://wiki.gnome.org/Apps/Planner https://wiki.gnome.org/Apps/Planner Planner is packaged in many distros, e.g.: - https://aur.archlinux.org/packages/planner/ https://aur.archlinux.org/packages/planner/ - https://packages.debian.org/source/buster/planner https://packages.debian.org/source/buster/planner - https://packages.ubuntu.com/groovy/planner https://packages.ubuntu.com/groovy/planner There's this unspoken rule of open-source project naming etiquette where you try to not use names used by projects once they reach certain level of popularity.