Assoc. Int. Volunteers in Costa Rica - http://www.volunteercostarica.net
Association of International Volunteers of Costa Rica, known locally in Costa Rica as AVIC, is a non-profit association.
Costa Rica Travel - http://www.costa-ricatravel.com/
Offers stories about ecotourism travel backpacking experiences.
Mesoamerican Ecoturism Alliance - http://travelwithmea.org/
An alliance of local organizations committed to the development and promotion of sustainable tourism as a means for supporting conservation efforts in Mesoamerica.