One of the oldest debunking sites on the Internet, Snopes.com focuses on urban legends, news stories and memes. the also cite their sources at the end of each debunking.
NLP created RumorGuard to help us all learn how to recognize misinformation and stop it in its tracks. Each fact-checked viral rumor contains concrete tips to help you build your news literacy foundation and confidently evaluate claims you see online.
Mercola is a doctor of osteopathy who has frequently been targeted by the FDA for promoting false, misleading and even dangerous medical advice. His site promotes products and his blog includes false and/or misleading information about medical topics.