A really nice todo list software for Linux, which can sync with either todoist or Nextcloud (so - I would think with any caldav software?).

Super nice design, supports Todo-list layout, Kanban board layout, projects, tags, due dates, notes, priorities, sub-tasks, reminders, basically most things most people need out of a task management software.

Unfortunately written primarily for Gnome environments so comes with some dependency baggage but in my mind very worth it.