Have you guys heard of it? It's a bunch of local Facebook groups where you can give and request free stuff and at the same time get to know your neighbors. There are many across US, and around the world. Usually some baby and kids stuff going around is why I'm bringing it up here. But is not themed in any way, clothing, furniture, household items, even food, as long as its free.

Just search for "buy nothing" to find one in your area or check out buynothingproject.org