To-do list and task manager.
Tasks & planning listings
Cards

Todoist
todoist.com
Todoist
To-do list and task manager.

TickTick
ticktick.com
TickTick
To-do list with calendar and habit tracking.

Akiflow
akiflow.com
Akiflow
Collects tasks from all your tools into one planner.

Sunsama
sunsama.com
Sunsama
Daily planner for calm, focused work.

Linear
linear.app
Linear
Issue tracking and planning for product teams.