Where can I find a list of foods with calcium?

You can create a list using the USDA reports by Nutrients. If you would like to look up the calcium content of a specific food, you can also use USDA's online searchable database of food composition, the National Nutrient Database for Standard Reference, which has the nutrient content (including calcium, other minerals, vitamins, protein, fat and carbohydrate) of nearly 8,000 foods.