This is a nonpartisan site, meaning it doesn't take sides but compares candidates' statements and assertions for truthfulness. It is sponsored by the Annenberg Public Policy Center (University of Pennsylvania).
A nonpartisan fact checking service by the Tampa Bay Times newspaper staff. It rates truthfulness by candidates and others in the public political sphere.
A service of the Washington Post newspaper that began in 2007. Its stated purpose is to "“truth squad” the statements of political figures regarding issues of great importance, be they national, international or local."