Bring - Clever shopping - simple and shared
Sidecook - Airbnb for personal chefs
Yummly - Yummly is a recipe app. You search through lots of recipes, add the ones you like, and even create shopping lists based on the recipes you pick. You can save your recipes with one click and later organize them into collections.
NYT Cooking - iPhone app with 17,000 free recipes from The New York Times
KitchenOwl - KitchenOwl is an application that makes grocery lists and recipe management easy.
BonAppetour - Airbnb for food with strangers