I found out about this cool service from the Journeywoman newsletter, which is also worth subscribing to for their cool tips and occasional nuggets of usefulness for the permanent traveler (although it’s geared more towards vacation travelers).
HelpX describes themselves as “an online listing of host organic farms, non-organic farms, farmstays, homestays, ranches, lodges, B&Bs, backpackers hostels and even sailing boats who invite volunteer helpers to stay with them short-term in exchange for food and accommodation.” Basically, it’s sort of like Servas for volunteers — you sign up on the website as a volunteer or a host. If you’re a host, you list where you are, and what you need done — say you need help in your garden, or getting your crops in. The volunteers post profiles as well (or, with an upgrade of 20 Euros for 2 years to the Premier account, can contact hosts directly), and the hosts may choose from the lists of available volunteers who they’d like to come stay with them. Volunteers are expected to put in a certain number of hours per week, and there is not necessarily any time limit for stays.
HelpX can be found in Australia, New Zealand, Canada, and Europe, including England, Scotland, Wales, Ireland, France, Germany, Spain, Portugal, Italy, Greece, Finland, Bulgaria and many other European countries.