Animal activism
Compassion Over Killing - Working to end animal abuse, COK primarily focuses on cruelty to animals in agriculture and promotes vegetarian eating as a way to build a kinder world for all of us, both human and nonhuman.
In Defense of Animals - In Defense of Animals is an international animal protection organization dedicated to ending the exploitation and abuse of animals by raising the status of animals beyond that of mere property, and by defending their rights, welfare and habitat.
People for the Ethical Treatment of Animals - People for the Ethical Treatment of Animals (PETA), with more than 800,000 members, is the largest animal rights organization in the world. Founded in 1980, PETA is dedicated to establishing and protecting the rights of all animals.
Predator Conservation Alliance - Predator Conservation Alliance (PCA), founded in 1991, is dedicated to conserving, protecting, and restoring native predators and their habitats in the Northern Rockies and Northern Plains. In short, we are saving a place for America's predators.
Satya magazine - A magazine of vegetarianism, environmentalism, animal advocacy, and social justice, based in New York City.
World Society for the Protection of Animals - WSPA works with more than 485 member organisations to raise the standards of animal welfare throughout the world.

Development
World Neighbors - World Neighbors works with the rural poor in 15 countries in Asia, Africa and Latin America to strengthen the ability of individuals and communities to solve their own problems of hunger, poverty and disease.
Yes magazine - Positive Futures Network, and its magazine Yes, is an independent, nonprofit organization supporting people’s active engagement in creating a just, sustainable, and compassionate world.

Environmentalism
E magazine - E magazine is a bimonthly “clearinghouse” of information, news and resources for people concerned about the environment who want to know “What can I do?” to make a difference.
INFORM - INFORM, Inc. is an independent research organization that examines the effects of business practices on the environment and on human health, with the goal of identifying ways of doing business that ensure environmentally sustainable economic growth.
Worldwatch magazine - The magazine of the Washington DC-based environmental thinktank, the Worldwatch Institute.

Professional Affiliations
Ashoka - Ashoka's mission searches the world for social entrepreneurs—extraordinary individuals with unprecedented ideas for change in their communities. Ashoka identifies and invests in these social entrepreneurs when no one else will.
Family Care International - FCI is dedicated to improving women's sexual and reproductive health and rights in developing countries, with a special emphasis on making pregnancy and childbirth safer.
Ford Foundation - The Ford Foundation is a resource for innovative people and institutions worldwide. Its goals are to: strengthen democratic values, reduce poverty and injustice, promote international cooperation, and
advance human achievement.
Friends of the Earth - Friends of the Earth defends the environment and champions a healthy and just world.
International Women's Health Organization - IWHC works to generate health and population policies, programs, and funding that promote and protect the rights and health of girls and women worldwide.
Population Action International - Population Action International (PAI) is an independent policy advocacy group working to strengthen public awareness and political and financial support worldwide for population programs grounded in individual rights. Founded in 1965, PAI is a private, non-profit group and accepts no government funds.
Save the Children - Save the Children is a leading nonprofit humanitarian relief and development organization working in more than 40 countries throughout the developing world and the United States. Its mission is to create lasting, positive change in the lives of children in need.
United Nations Children's Fund - UNICEF works for every child to provide health, education, equality, and protection.
United Nations Development Fund for Women - UNIFEM provides financial and technical assistance to innovative programmes and strategies that promote women's human rights, political participation and economic security.
United Nations Population Fund - The United Nations Population Fund, extends assistance to developing countries, countries with economies in transition and other countries at their request to help them address reproductive health and population issues, and raises awareness of these issues in all countries, as it has since its inception.
World Conservation Society - The Wildlife Conservation Society saves wildlife and wild lands through careful science, international conservation, education, and the management of the world’s largest system of urban wildlife parks.
World Wildlife Fund - Known worldwide by its panda logo, World Wildlife Fund (WWF) leads international efforts to protect endangered species and their habitats.
Worldwatch Institute - Founded by Lester Brown in 1974, the Worldwatch Institute offers a unique blend of interdisciplinary research, global focus, and accessible writing that has made it a leading source of information on the interactions among key environmental, social, and economic trends.

Vegetarianism
Veg News - The premier magazine to focus on a vegetarian lifestyle, VegNews offers its over 100,000 readers up-to-date information on living a compassionate and healthy lifestyle.
The Viva Vegie Society - The Viva Vegie Society is a vegetarian advocacy and information service that is the publisher of 101 Reasons Why I'm a Vegetarian. It is based in New York City.

Wangari Maathai
Green Belt Movement - The organization founded by Wangari Maathai that has planted over 30 million trees throughout Kenya and East Africa.
Green Belt Movement North America - A group of United States organizations who have sponsored or supported the work of the Green Belt Movement and Wangari Maathai.
Wangari Maathai's personal website - Wangari Maathai is the founder of the Green Belt Movement in Kenya and the 2004 Nobel Peace Prize laureate.