ToDoList 8.2.2

This free (for life) Windows desktop application offers an effective and flexible way to stay on top of your daily tasks.

People get ToDoList for their own specific purposes and usually tailor the software to suit their usage. But for a newcomer it's a challenge to understand what the options are. “How can I 'tailor' it to suit my needs if I don't know how it works in the first place?” You could simply create a task for each food item, or you can create a sub-task for each grocery store, with a sub-task under each store for each food item.