Roaming Hunger - App and site to find any food truck anytime, anyplace.
Bring - Clever shopping - simple and shared
Street Food Mapper - A web app for searching food trucks in real-time.
Google Shopping List - Google Shopping List is a grocery list and recipe manager app that helps you to get organized and save time.
The New Forker - An interactive map of restaurants reviewed in The New Yorker
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.