Todoist - Todoist is a to-do list that helps you get organized, at work and in life.

Bring - Clever shopping - simple and shared

Remember The Milk - Remember The Milk is a task and time management application for mobile devices.

Google Shopping List - Google Shopping List is a grocery list and recipe manager app that helps you to get organized and save time.

Org mode - Org: an Emacs Mode for Notes, Planning, and Authoring

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.