Slick Shopper is a slick little list app. It does one very specific thing: make shopping lists. In fact, the developer thought through little details such as a location-specific context for your lists. If you're needing things only in your bedroom (perhaps a trip to Bed, Bath and Beyond is in your future?), Slick Shopper will winnow the list down to just those items with a couple of clicks.
While list apps are plentiful on the store, yet again we see a plethora of choices covering niche angles. Now the only problem is not littering your iPhone with list apps -- not to be confused with "to do" apps. Slick Shopper (iTunes link) is currently $.99 on the App Store.