Clever Shopping list lets you manage your shopping list in a convenient way.
Add products to the application. The latter will generate QR codes that you can print. Stick the printed list of QR codes in your kitchen and scan the corresponding code when you notice that something is missing in your fridge!
You can also add product manually or scan the barcode of the products you need to buy before throwing them away!
The application is in beta version. Test it and let me some feedbacks and new ideas/proposals via the "propose your idea" button.
Note: you need Google Cloud Print to be able to print lists (easy to set).