Wwoofing, at first, sounds a bit like the noise a dog makes. The practice, which is an acronym for “worldwide workers on organic farms” or “willing workers on organic farms,” is actually a global, cooperative system that connects organic, permacultural or biodynamic farmers with a volunteer workforce. It symbiotically benefits both the farmer and the woofer. The farmer gets a curious, excited workforce wishing to learn about the operation of small, sustainable farms.
If you've ever considered Wwoofing - this is a great starting point.