Ujamaa is a volunteer hostel located in Arusha, Tanzania.  It provides budget accommodation where you can meet like-minded people and spend time volunteering as well. It also offers volunteering opportunities with local organizations in desperate need of help.  Visit site

A community and wildlife project that incorporates local community upliftment, including skills training, environmental education and aid work; with the rehabilitation of injured and/or orphaned wildlife for future release and monitoring. Umpalazi also provides sanctuary for other displaced animals.  Visit site

Unite For Sight is a non-profit organization that empowers communities worldwide to improve eye health and eliminate preventable blindness. Local and visiting volunteers work with partner eye clinics to provide eye care in communities without previous access, with the goal of creating eye disease-free communities.  Visit site

The United Nations Volunteers programme is the volunteer arm of the United Nations that supports sustainable human development globally through promotion of volunteerism. It mobilizes qualified UN Volunteers and encourages people to become active in volunteering in their countries. Since 1971, some 30,000 UN Volunteers have worked in about 140 countries. Volunteers must be at least 25 years old and have some professional work experience.  Visit site

United Planet (UP) is a leading international, educational, humanitarian, and peace-building, non-profit organization with members and volunteers in over 150 countries devoted to fostering cross-cultural understanding and friendship, supporting communities in need, and promoting social & economic prosperity among cultures in order to unite the world in a community beyond borders. As featured on CNN, United Planet has a diverse range of initiatives, including 1-52 week cultural and volunteer programs, called United Planet Quests, in 50 countries.  Visit site

United Way of America is the national organization dedicated to leading the United Way movement. Local United Ways create long-lasting community change by addressing the underlying causes of the most significant local issues. Common focus areas include helping children and youth achieve their potential, promoting financial stability and independence, and improving people's health. Its goal is to create long-lasting changes by addressing the underlying causes of problems.  Visit site

UFSFC is a non profit organization to promote education as a fundamental human right through construction and establishment of free primary and secondary schools for children.  Visit site

UniversalGiving is a non-profit, social entrepreneurship that connects individuals with a wide range of organizations and their volunteer opportunities from around the world. It aims to make giving and volunteering a natural part of everyday life.   Visit site

The Volunteer Program of the University of Costa Rica is developing a project

that intends to create a bridge with international volunteer organizations.

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UNV’s Online Volunteering (OV) service connects development organizations and volunteers over the Internet and supports their effective online collaboration.
It gives development organizations access to a broader pool of knowledge and resources to enhance their capacities, while it offers individuals worldwide additional opportunities to volunteer for development and contribute to the achievement of the Millennium Development Goals.  Visit site