Trello, Todoist, Workflowy, ClickUp, TickTick, Habitica, Wekan, Org mode, Zenkit, Quire, Tasks.org, Remember The Milk, iProcrastinate, Zendone, DoItRight, Noteworthy+, Simply Done, task.php, SS Birthday Reminder Live, Kanban2go, Quantus Tasks, dooity, Flask Lists, Printable Checklist, Hightrack are some alternatives to Taskfully.