Task clients

Desktop

• Endeavour: ex gnome-tasks

Android

• Davx5 FAQ: How do I use tasks and advanced features like sub-tasks with DAVx⁵?
• jtx Board
  • Recommended and developed in collaboration with DAVx⁵
  • Supports Journals, notes and tasks
  • txBoard: Notes and Journals on Nextcloud
• tasks.org
  • Davx5 says some functions are not supported
• Stale: OpenTasks

• Nextcloud tasks

Kanban boards with caldav support

• Kanboard doesn't have CalDAV tasks support
• Wekan FR: CalDAV or iCal Support
• Unmaintained: calban

cli clients

• todoman