Location: Norwich, VT
In addition to the actual farmstead (which I've not yet seen, alas), these folks run a farmstand not too far from the centre of town, open from May through November. Perennially available foods include eggs, cheeses, milk, ice cream, bread, and, of course, maple syrup. They also offer a variety of seasonal produce, such as fiddleheads, potatoes, leeks, onions, various greens, tomatoes (including heirloom varieties!), berries, squash, and much more. They even have potted herbs and flowers!
What's not produced directly by Killdeer is likewise available via local sources, most of what they sell is organic, and everything I've tried so far is delicious.