Skepticism and critical thinking

Action Skeptics

Bad Science

The Bronze Blog

Butterflies and Wheels

California Skeptics

Center for Inquiry

Center for Inquiry Metro NYC

Church of Critical Thinking

Committee for Skeptical Inquiry

Conspiracy Factory

The Crackpot Page

Crank dot Net

Critical Thinking Community

Richard Dawkins Foundation for Reason & Science

denialism.com

Fallacies, Errors, & Tricks

The Fallacy Files

Freethought Weekly

Handbook of Fallacies

Holy Smoke

Indiana Skeptics

Infophilia

The Inoculated Mind

Logical Fallacies (Adam Smith Institute)

The Mad Revisionist

Memoirs of a Skepchick

The Millennium Project

Mondo Skepto

Museum of Hoaxes

The New England Skeptical Society

North Texas Skeptics

Philadelphia Association for Critical Thinking

A Photon in the Darkness

Point of Inquiry

Pooflingers Anonymous

Practical Skepticism

Podblack Blog

James Randi Educational Foundation

Rationally Speaking

The Rogues Gallery

Sinbad’s Bullshit Detector

Skeptic Friends Network

Skeptic Magazine (UK)

The Skeptical Alchemist

Skeptical Information Links

Skeptico

SkepticReport.com

The Skeptic’s Dictionary

The Skeptics’ Guide to the Universe

The Skeptics Society

Snopes.com: Urban Legends

Stop Sylvia Browne

The Straight Dope

Stupid Evil Bastard

Two Percent Company

The Uncredible Hallq

Unscrewing the Inscrutable

ZeroIntelligence.net