Media Matters for America is a web-based, progressive research and information center dedicated to comprehensively monitoring, analyzing, and correcting conservative misinformation in the US media.

Using the website mediamatters.org as the principal vehicle for disseminating research and information, Media Matters posts rapid-response items as well as longer research and analytic reports documenting conservative misinformation throughout the media. Additionally, Media Matters works daily to notify activists, journalists, pundits, and the general public about instances of misinformation, providing them with the resources to rebut false claims and to take direct action against offending media institutions.

http://mediamatters.org