Multinational programs include:
Ecovolunteer Nature Travel offers ecotourism to North and South America, Europe, Asia, and Africa.
ISU Vet Med Study Abroad offers summer abroad programs for students enrolled in US veterinary medicine programs.
Sea Shepherd offers pirate-style conservation for volunteers.
Wildlife Trust is involved in a wide range of projects around the world.
Willing Workers on Organic Farms offer farmstays around the world.
Worldwide Veterinary Service takes vets, vet students, vet nurses, and non-vets to a variety of countries around the world to give out veterinary care.