ShopaList is an iPhone app I originally created for a university project two years ago. After getting fed up with looking for a decent shopping list app (most were far more complicated than I wanted) I decided to revive ShopaList, tidy it up, remove some of the more pointless features (looking at you, BlueTooth sharing) and make it into the app I really wanted.
At the moment this is a very simple app. You make a list, and that list has some items. You can place these into your basket as you go round the shops, and if you want to track how much you're spending, you can say how much the item costs.

I make a damn good French toast.
But the simplicity was a big reason for making the app - press one button to add to your list, and remove with a swipe, all from the main list screen. No need to stand in the middle of the aisle and enter a ton of information that isn't strictly necessary.
There are a lot of features missing at present - like the ability to have a currency other than Her Majesty's Pound. There will be plenty of updates over the next few months, but it's already at the point where I'm happy using it whenever I head out for a loaf of bread and box of Coco Pops.
If you're in the UK, check it out (completely free) on the App Store. I'll bring it worldwide when I add support for other currencies! I'll also be adding iPad and (hopefully) sync support soon. Let me know what you think on Twitter, or by email: neil at this domain.