Task Cards

Task cards is the easiest task management app for the iPad. It uses index cards to organize tasks on a desk top, and provides simple tools to manage them.
Features include

▸ Tasks can be shared across index cards.
▸ Due dates and recurring tasks.
▸ Priorities.
▸ Search.
▸ Notes.
▸ Sorting by due date, priority, or alphabetical.
▸ Quick access to overdue and todays tasks.
▸ Ability to see completed tasks on the back of a card.
▸ Emailing tasks.
▸ Pinch card to view all cards.

Some of the reviews
☑ "Simple enough to be useful"
☑ "I have never ever been more organized"
☑ "Outstanding. Best to-do list Ive found"
☑ "I use it more than other more sophisticated apps Ive purchased for the ease of the interface"
☑ "Brilliant in its simplicity"
☑ "Focuses on features, not frills"