FactCheck.org
Award-winning project of the Annenberg Public Policy Center of the University of Pennsylvania.
www.factcheck.org
Fact Checker
A Washington Post site and column with the goal of acting as "truth squad" for the statements of political figures.
https://www.washingtonpost.com/news/fact-checker
FlackCheck.org
A service of FactCheck.org providing resources designed to help viewers recognize flaws in arguments in general and political ads
www.flackcheck.org
Health News Review
A web-based project that rates the completeness, accuracy, and balance of U.S. news stories that include claims about medical treatments, tests, products and procedures
http://www.healthnewsreview.org/
Media Matters for America
A politically progressive media watchdog.
http://mediamatters.org/
NewsBusters
Media Research Center project dedicated to exposing & combating liberal media bias
www.newsbusters.org
OpenSecrets.org
The website of the Center for Responsive Politics, a research group tracking money in U.S. politics and its effect on elections and public policy
www.opensecrets.org/
PolitiFact
The Pulitzer Prize winning project from the Tampa Bay Times
http://politifact.com
Snopes.com
An independent reference page aiming to debunk or confirm widely spread urban legends.
www.snopes.com
Sunlight Foundation
A national, nonpartisan, nonprofit organization that uses the tools of civic tech, open data, policy analysis and journalism to make our government and politics more accountable and transparent to all
https://sunlightfoundation.com