Microsoft To-Do - Task management tool
Focus To-Do - Be focused and make things easier.
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
Bright To-Do - Bright To-Do app helps users in achieving their life goals by simply creating checklists to keep a check and balance on their daily routine.
doo - A smart, simple app for reminders and to-dos
Calendar+ Schedule Planner App - Calendar+ Schedule Planner app provides features to allow users to effortlessly manage all their events by creating a schedule to attend all the events without missing any important calendar event.