GSTC – The Global Sustainable Tourism Council – serves as the international body for fostering increased knowledge and understanding of sustainable tourism practices, promoting the adoption of universal sustainable tourism principles and building demand for sustainable travel.
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IIPT – International Institute for Peace through Tourism – The International Institute For Peace Through Tourism (IIPT) is a not for profit organization dedicated to fostering and facilitating tourism initiatives which contribute to international understanding and cooperation, an improved quality of environment, the preservation of heritage, and through these initiatives, helping to bring about a peaceful and sustainable world
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ACOPROT – Costa Rican Association of Tourism Professionals
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http://www.actuarcostarica.com/
ACTUAR – Alianza Comunitaria Conservacionista de Turismo Alternativo Rural – Community Conservation Alliance for Alternative Rural Tourism