Todoist

With over 20 million users, Todoist is an excellent application for planning both large and little undertakings. Todoist’s productive characteristics include the ability to record ideas and tasks as they occur, to prioritize tasks, and to manage tasks.

Features:

• Planning large and small initiatives.
• Arrange tasks in order of importance.
• Support for Windows, Mac OS, Android, and iOS platforms.
• There is a free version or a monthly fee of $3.