American Civil Liberties Union
http://www.aclu.org
American Enterprise Institute for Public Policy Research
http://www.aei.org/
The James A. Baker III Institute for Public Policy
Rice University
http://riceinfo.rice.edu/projects/baker
Brookings Institution
An independent, nonpartisan research and educational institution focused on public policy issues in the areas of economics, foreign policy, and governance.
http://www.brook.edu/
The Carter Center
A nonpartisan research, analysis and action center, in partnership with Emory University, works in fields of conflict resolution, promotion of freedom and democracy, and improvement in health.
http://www.cartercenter.org/
Cato Institute
A non-profit public policy research foundation espousing the principles of limited government, individual liberty, free markets and peace in public policy debates.
http://www.cato.org/
Center for Strategic and International Studies (CSIS)
http://www.csis.org/
Center of International Studies (CIS), Woodrow Wilson School of Public and International Affairs, Princeton University
http://www.wws.princeton.edu/~cis/
The Constitution Project
Public Policy Institute. Georgetown University. Access to reports, commentary, amicus briefs, resources, and experts from this bipartisan nonprofit institution, “designed to make constitutional issues a part of ordinary political debate.” Materials are arranged topically by the controversial issues on which the committees are working towards consensus: authority to engage in war, protection of individual liberties, risks in death penalty executions, restraint in amending the Constitution, public understanding of judicial independence, adequate counsel for poor defendants, and changes needed in sentencing laws.
http://constitutionproject.org/index.html
Council for Excellence in Government
http://www.excelgov.org
Council on Foreign Relations
http://www.cfr.org/
DemocracyNet
National Endowment for Democracy
http://www.ned.org
Demos: A Network for Ideas & Action
Includes news, analysis, and research on democracy issues at all levels of government, promoting improvements to the state of American democracy.
http://www.demos-usa.org
Electronic Frontier Foundation
http://www.eff.org
Electronic Privacy Information Center
http://www.epic.org
Foreign Policy Institute (FPI)
The Johns Hopkins University, Paul H. Nitze School of Advanced International Studies (SAIS).
http://www.sais-jhu.edu/centers/fpi/index.html
Heritage Foundation
A research and educational institute formulating and promoting a broad spectrum of conservative public policies.
http://www.heritage.org/
Hoover Institution on War, Revolution and Peace
Stanford University
http://www-hoover.stanford.edu/
Hudson Institute
Research organization seeking to guide debate and change on enduring policy challenges.
http://www.hudson.org
Pew Research Center for the People and the Press
An independent opinion research group that provides surveys, studies, and commentary on attitudes toward the press, politics, and public policy issues. Especially known for its research program, The People, The Press & Politics, featuring a division of the American electorate into distinct voting groups, attempting to identify basic values and attitudes, and resulting political behaviors.
http://people-press.org/
PollingReport.com
Independent, nonpartisan resource reporting on a variety of trends in American public opinion.
http://pollingreport.com/
Public Diplomacy Foundation
This web site is designed to inform anyone interested in U.S. foreign affairs regarding the important role public diplomacy has played, and is playing, in supporting U.S. foreign policy and in safeguarding and advancing U.S. interests.
http://www.publicdiplomacy.org/
Rand
A nonprofit research and analysis institution addressing critical social, economic, and national security issues.
http://www.rand.org/
United States Institute of Peace
http://www.usip.org/
Urban Institute
A nonprofit, nonpartisan policy research and educational organization addressing a broad range of social, economic, and governance problems facing the nation.
http://www.urban.org/
World Resources Institute
An independent nonprofit organization working towards practical policy proposals that foster environmentally sound, socially equitable development.
http://www.wri.org/
Worldwatch Institute
Non-partisan, independent, interdisciplinary research organization focusing on an environmentally sustainable and socially just society.
http://www.worldwatch.org/