Trello, Todoist, Microsoft To Do, Workflowy, ClickUp, TickTick, Habitica, Wekan, Picniic, Zenkit, Desktop-Reminder, Quire, Remember The Milk, GoTasks, Casual.PM, OpenLoopz, Taskbook, Makagiga, EdenList, Concenturio, Bringli, DevTodo, Time 2: Beat Procrastination, cloudList, meLearning, MyAsana, ActionComplete, Quicktask (Vim plugin) are some alternatives to Vim-taskwarrior.