Accuracy in Media (AIM) -- investigates complaints of media misdeeds.
American Society of Newspaper Editors (ASNE) Ethics Code Page
Center for International Media Ethics
Committee for Accuracy in Middle East Reporting in America
Indiana University School of Journalism -- Ethics Case Studies
Journal of Mass Media Ethics
Media Matters -- PBS series examining reporting ethics.
Media Research Center/ -- conservative media watchdog group.
Media Watch -- challenging racism, sexism and violence in the media through education and action.
News Watch -- resource for fair coverage of minorites, people of color, and lesbians/gays.
Online Journalism Review's Ethics Section
Poynter Institute's Ethics Journal
Poynter Online's Ethics Tipsheets
Radio-Television News Directors Association (RTNDA) Ethics Projects
Society of Professional Journalists (SPJ) - Code of Ethics