Agenda - A date-focused note taking app for both planning and documenting your projects.
Focus To-Do - Be focused and make things easier.
ToDoBook - Turn your Facebook (& other social media) News feed into a to-do-list.
To-Do Calendar Planner - To-Do Calendar Planner app comes up with a scrollable calendar to enable users to accomplish all your study and other daily life tasks while saving some extra time for other activities.
Todoist 10 for iOS - A completely new Todoist for iOS
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.