World Wide Opportunities on Organic Farms (WWOOF, /ˈwʊf/), or Willing Workers on Organic Farms, is a loose network of national organizations that facilitate placement of volunteers on organic farms. While there are WWOOF hosts in 99 countries around the world, no central list or organization encompasses all WWOOF hosts. As there is no single international WWOOF membership, all recognised WWOOF country organizations strive to maintain similar standards, and work together to promote the aims of WWOOF.