Help Exchange (Website)
Free listing of organic and non-organic host farms, lodges, B&B, backpacker hostels and others in Australia, New-Zealand and Europe who invite volunteer helpers to stay with them in exchange for free meals and accommodation.
Organic Volunteers (Website)
Educational exchanges in sustainability. A match making service between hosts and volunteers who share their time, knowledge and skills for environmental sustainability.
Sunseed Desert Technologies (Website)
A volunteer project set up in the driest corner of Spain, with the aim of finding and spreading ways of reclaiming degraded, semi-arid land and helping people living on such lands.
WWOOF International - Willing Workers On Organic Farms (Website)
Dedicated to helping those who would like to work as volunteers on organic farms internationally.