Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
Workflowy - A better way to organize your mind.
Remember The Milk - Remember The Milk is a task and time management application for mobile devices.
ABBYY Business Card Reader - Scan cards ≡ in a second and manage them everywhere ☁
Flow-e - Turn your Gmail or Office365 inbox to a Visual Task Board.
TickTick - TickTickis a cross-platform to-do list app & task manager helps you to get all things done and make life well organized.