Skeptical Inquiry
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 - Carl Sagan's Baloney Detection Kit
 - Tools for testing arguments and detecting fallacious or fraudulent arguments, based on Sagan's book "The Demon Haunted World: Science as a candle in the dark."
 
- 22
 - National Center for Teaching Thinking
 - A service organization for educators dedicated to providing programs for K - 12 schools and colleges on teaching and assessing skillful thinking,.
 
- 23
 - Open Courseware on Critical Thinking
 - Over one hundred tutorials on critical thinking, logic, scientific reasoning, creativity, and other aspects of thinking skills.
 
- 24
 - Philadelphia Association for Critical Thinking
 - Addressing strange phenomena with the mindset, "What are the facts and what can we deduce from them?"
 
- 26
 - Responsible Thinking
 - Online book by Bob Korn promoting critical thinking. Outline, contact information.
 
- 27
 - Skeptoid: Critical Analysis of Pop Phenomena
 - Provides a weekly podcast dedicated to furthering knowledge by eliminating the widespread pseudosciences that infect popular culture.
 
- 28
 - Wikipedia - Critical Thinking
 - Hyperlinked encyclopedia entry includes an overview, concepts and principles, classroom applications, and effectiveness of instruction.
 
- 29
 - Point of Inquiry
 - The Center for Inquiry’s radio show and podcast. Point of Inquiry explores CFI’s three research areas: pseudoscience and the paranormal, alternative medicine, and religion and secularism.
 
- 30
 - Skepticality Skeptic and Critical Thought News
 - Roughly monthly podcast of interviews with prominent skeptical thinkers.
 
- 31
 - The Skeptic Zone
 - Podcast from Australia for science and reason. Includes an episode archive and subscription information.
 
- 32
 - The Skeptics' Guide to the Universe
 - Weekly science podcast produced by the New England Skeptical Society. Also provides blogs, forums, videos and resources.
 
- 33
 - Australian Skeptics
 - Group that investigates the paranormal and pseudo-science from a responsible scientific viewpoint.
 
- 34
 - Bay Area Skeptics
 - San Francisco Bay Area skeptical organization which aims to encourage rational thought and critical thinking through the use of scientific methods. Provides a blog, newsletter and information on membership.
 
- 36
 - CICAP
 - The Italian Committee for the Investigation of Claims on the Paranormal, promoting a scientific and critical enquiry of supposed paranormal and mysterious phenomena.
 
- 37
 - Committee for the Scientific Investigation of Claims of the Paranormal
 - World-wide organization that encourages the critical investigation of paranormal and fringe-science claims from a responsible, scientific point of view.
 
- 38
 - Drinking Skeptically
 - Regional, informal social events designed to promote fellowship and networking among skeptics, critical-thinkers, and like-minded individuals.
 
