There seems to be a plethora of food related apps although not many useful ones. I'm looking for anything food, cooking or dining related.
Check the transcript for yesterday's Kojo Namdi show - Michael Ruhlman, Dorie Greenspan and Monica Bhide talked about apps. Good stuff. http://thekojonnamdishow.org/shows/2011-11-02/cooking-theres-app/transcript
I really like the Epicurious app. It is really nice to have a recipe pulled up on my smartphone rather than dragging my laptop in the kitchen. It also has a great feature that allows you to make a grocery list from recipes you select.
I like the Epicurious app as well as the Easy Recipes app from Pocket Cocktails Inc.
Cook's illustrated has a good app. Taste Book is a good compilation as well.