Bread for the City operates DC's largest food pantry, and provides other free services to the city's low-income residents: a medical clinic, legal advice and representation, social services, and clothing -- all in an atmosphere of dignity and respect.
ProducePedia is a free resource that covers the types of fresh produce that can be delivered to food pantries. Each entry includes information on color, taste, and possible uses. People unfamiliar with the vegetable or fruit will learn how to use it, and those who are familiar with it still might learn a fun fact or two!
The Cooperative Extension sites have a wealth of information for any backyard gardener. Once you go to the site (each one if very different from the others) look for a link for “homes and gardens”, “landscape”, “consumer horticulture”, etc. to find information on improving your backyard garden. Neighboring state sites may offer information your own state’s site lacks.