AEON
Alliances Abroad
American Friends Service Committee
Amerispan Unlimited
Center for International Service-Learning for the Academic Community
Colorado China Council
Cross-Cultural Solutions: International Volunteer Programs
Earthwatch
Educational Services International
Global Volunteer Network
Global Volunteers
Habitat for Humanity
International Partnership for Service-Learning and Leadership
International Schools Services
Mobility International
Peace Corps
Peaceworks
Rainforest Action Network
Servenet
Volunteers for Peace International Workcamps
World Teach