Institute for Global Excellence (InstiGlobe)
- Think tank and charity dedicated to solving economic, social, education, technology, and governance issues.
- http://www.instiglobe.org/

International Policy Network
- IPN is a network of policy institutes around the world defending property rights, the rule of law, free markets and free speech.
- http://www.policynetwork.net/

Institute for Liberty and Democracy
- The mission of the Peru based institute is to assist developing and former Soviet nations in the transition to a modern market economy that actually gives those who have been locked out of the system a stake in the economy.
- http://www.ild.org.pe/

Iowa Public Interest Research Group
- Iowa PIRG is a nonprofit public interest organization dedicated to preserving the environment, protecting consumers and holding government accountable to the public interest. Located in Des Moines, Iowa.
- http://www.iowapirg.org/

International Center for Peace and Development
- The ICPD conducts research projects on a wide range of issues concerning global security, conversion of resources from military to civilian purposes, food security, employment, economic development, and the environment.
- http://www.icpd.org/

Institute for Policy Studies
- A "think tank" for progressive research and action to create a more responsible society built around the values of justice, nonviolence, sustainability, and decency.
- http://www.ips-dc.org/

The International Research and Exchanges Board
- A US-based nonprofit organization committed to international education in academic research, professional training and technical assistance.
- http://www.irex.org/

Institute of Economic Affairs
- The IEA is the UK's original free-market think-tank, founded in 1955.
- http://www.iea.org.uk/

The Independent Institute
- A nonprofit, scholarly research and educational organization which sponsors comprehensive studies on political economy.
- http://www.independent.org

Independence Institute
- A non-partisan, non-profit public policy research organization established upon the eternal truths of the Declaration of Independence and dedicated to providing timely information to concerned citizens, government officials, and public opinion leaders.
- http://www.i2i.org

Israel Center for Social & Economic Progress
- An independent pro-market public policy think tank since 1984.
- http://www.icsep.org.il

Institute for American Values
- The Institute for American Values, founded in 1987, is a private, nonpartisan organization devoted to contributing intellectually to the renewal of marriage and family life and the sources of competence, character, and citizenship.
- http://www.americanvalues.org

Institute for Women's Policy Research
- A non-profit organization dedicated to researching policy issues of critical importance for women. IWPR's policy areas include poverty and welfare, family and work, health care and domestic violence, and employment.
- http://www.iwpr.org/

INURA - International Network for Urban Research and Action
- Network of people involved in action and research in urban areas, on issues such as social exclusion, community-led environmental schemes, and social housing.
- http://inura.org

Institute of Science, Technology and Public Policy
- Founded at Maharishi University of Management in Fairfield, Iowa, to identify, scientifically evaluate, and implement through public policy, promising new technologies and programs that offer practical solutions to problems facing the United States.
- http://www.istpp.org/

International Relations Center
- A nonprofit organization whose mission is to provide information and analysis that increase social and economic justice throughout the world.
- http://www.irc-online.org/