World wide organizations

James Randi Educational Foundation
The James Randi Educational Foundation is a not-for-profit organization founded in 1996. Its aim is to promote critical thinking by reaching out to the public and media with reliable information about paranormal and supernatural ideas so widespread in our society today.

The Skeptics Society
The Skeptics Society is a scientific and educational organization of scholars, scientists, historians, magicians, professors and teachers, and anyone curious about controversial ideas, extraordinary claims, revolutionary ideas, and the promotion of science. Its mission is to serve as an educational tool for those seeking clarification and viewpoints on those controversial ideas and claims.

CSI
The Committee for Skeptical Inquiry promotes science and scientific inquiry, critical thinking, science education, and the use of reason in examining important issues. It encourages the critical investigation of controversial or extraordinary claims from a responsible, scientific point of view and disseminates factual information about the results of such inquiries to the scientific community, the media, and the public.

Richard Dawkins
is a British ethologist, evolutionary biologist and popular science author. He was formerly Professor for Public Understanding of Science at Oxford and was a fellow of New College, Oxford. He is the author of several best-selling books, and a prominent critic of creationism and intelligent design.

Richard Dawkins Foundation for Reason and Science
The Richard Dawkins Foundation for Reason and Science (RDFRS or RDF) is a non-profit organization founded by biologist Richard Dawkins in 2006. Among its planned activities, RDFRS will finance research into the psychology of belief and religion, finance scientific education programs and materials, and publicize and support secular charitable organizations.

Center for Inquiry (CFI)
The mission of the Center for Inquiry is to foster a secular society based on science, reason, freedom of inquiry, and humanist values.

Science and what is not

General

Bad Science
Ben Goldacre is an award winning writer, broadcaster, and medical doctor who has written the weekly Bad Science column in the Guardian since 2003. He appears regularly on Radio 4 and TV, and has written for the Guardian, Time Out, New Statesman, and the British Medical Journal as well as various book chapters.

Skeptic’s Dictionary
The Skeptic’s Dictionary features definitions, arguments, and essays on topics ranging from acupuncture to zombies, and provides a lively, commonsense trove of detailed information on things supernatural, paranormal, and pseudoscientific.

What’s the harm?
What’s the harm is designed to make a point about the danger of not thinking critically. Namely that you can easily be injured or killed by neglecting this important skill. It contains the stories of over 670,000 people who have been injured or killed as a result of someone not thinking critically.

Archaeology

Bad Archaeology
Bad Archaeology is the brainchild of a couple of archaeologists who are fed up with the distorted view of the past that passes for knowledge in popular culture.

Astronomy

Bad Astronomy
Phil Plait, the creator of Bad Astronomy, is an astronomer, lecturer, and author. After ten years working on Hubble Space Telescope and six more working on astronomy education, he struck out on his own as a writer. He has written two books, dozens of magazine articles, and 12 bazillion blog articles. He is a skeptic, and fights misuses of science as well as praising the wonder of real science.

Evolution & Creationism

The Panda’s Thumb
Defending evolution against Creationists, using nefarious methods such as science and evidence.

Pharynglula
Biologist and associate professor P.Z. Myers writes about evolution, creationism and other things.

TalkOrigins
The ultimate source for countering Creationist arguments.

Health & Medicine

Quackwatch
Your Guide to Quackery, Health Fraud, and Intelligent Decisions.

Stop Jenny McCarthy
is Kylie Sturgess’ and Michael Rosch’s effort to stop Jenny McCarthy from falsely attributing vaccines as a cause of autism.

Psychics

Bad Psychics
The aim of BadPsychics.co.uk is to investigate the claims of psychics specifically, find out the truth and expose the frauds.

StopSylvia
is Robert S. Lancaster’s comprehensive site criticizing and exposing Sylvia Browne.