The following organizations monitor and evaluate journalism and reporting, checking for bias and accuracy. Most have their own bias, as indicated.
Accuracy in Media (AIM): perspective is "conservative" or right-leaning
Fairness And Accuracy in Reporting (FAIR): perspective is "progressive" or left-leaning
Media Matters for America: perspective is "progressive" or left-leaning
Media Research Center: perspective is "conservative" or right-leaning
PEW Center on Journalism & Media - nonpartisan research on journalism and news audiences