CardStacks is a simple todo-list app developed by Patrice Mongeau.
With CardStacks, you can create stacks, and cards, and write whatever on them.
To get started, touch the + to make a new stack, and name it. You can make more stacks if you want.
Next, you can make cards in each stack, and edit, share or delete them by using the bottoms app icons.
For each stack, you can also reorganize your cards by dragging them right or left and by using the arrows. Tip: It's easier in landscape mode.