Pocket Lists rated 5 star based on 3 reviewers (small sample size though )
Pocket Lists is the ultimate checklist & to-do app. A well-balanced,
powerful and simple to use app -- great as an everyday to-do organizer and a
checklist app for groceries, travel packing, and more.
Link: http://itunes.apple.com/app/pocket-lists/id482537116?mt=8