Snopes: fact-checks Internet rumours and stories. This will determine whether that post your cousin shared on Facebook re: gun violence in America has any merit.
Flackcheck: political literacy companion site to the award-winning FactCheck.org.
Media Bias/Fact Check: Media Bias/Fact Check (MBFC News) is an independent online media outlet. MBFC is dedicated to educating the public on media bias and deceptive news practices.