RationalWiki - for material related to Creationism, Global Warming, Alternative Medicine, Conspiracy Theories, Ufos, the Paranormal, Denialism, and Logic.
Skeptical Software Tools – some very handy plugins, programmes and tips to help you avoid bad science, and promote scientific skepticism, on the web.
What’s the harm? – a primer on various paranormal, supernatural and religious sources for potential harm.
The Quackometer – Andy Lewis’s superb resource for debunking “dubious medical claims and inflated capabilities for cures”.
Twenty Tips For Interpreting Scientific Claims – A useful guide from Nature, on of the premier scientific journals.
Australian Skeptics - investigating the paranormal and pseudo-scientific.
Skeptic History – Essays on scientific skepticism.
Snopes - the definitive Internet reference source for urban legends, folklore, myths, rumors, and misinformation, including debunking Science and Religion myths.
Rbutr - tells you when the webpage you are viewing has been disputed, rebutted or contradicted elsewhere on the internet.
Donotlink - provides ability to link to scams, pseudoscience, misinformation, alternative medicine, conspiracy theories, racist/sexist blog posts without improving the search engine position of the site you are discussing.
The BBC's Ethics Guide features discussions of Euthanasia, Abortion, Honour Crimes, Animal Ethics and more.
UK Rationalist Association - a 125 year old veteran.
A Simple Guide to Humanism – simple answers to frequently asked questions about humanism.
What is Humanism? Philosopher Stephen Law explains what is it and what it's not.
The two meanings of "Secularism"
Austin Cline's About Atheism: everything you want to know about atheism, agnosticism, critiquing religion and life without gods.
St James Ethics Centre - Australia's leading centre for applied ethics.
Non-belief in Australia: census statistics from 1901 to 2011.
Primatologist Frans de Waal is interviewed on Morality without God.
Philosophical Meditation - how to do Stoic Meditation translated into simple, modern terms.
The wonderful "Thou shalt not commit logical fallacies", which went viral, by Australian Jesse Richardson
Extremely useful graphic of the History of Philosophy.
Statistics Done Wrong - A guide to the most popular statistical errors and slip-ups committed by scientists – and all of us – every day.
An Illustrated Book of Bad Arguments: not only clear explanations but beautiful illustrations of flaws in logical thinking.
Tim van Gelder from Austhink Consulting on the Seven Habits of Highly Critical Thinkers.
Proper criticism – Ray Hyman’s essay on on how we can improve the quality of our analysis and criticism.
The Fine Art of Baloney Detection – a summary of a chapter from Carl Sagan’s indispensable book, The Demon-haunted World.
Austhink - a Melbourne-based consultancy that specialises in critical thinking tools and insights.
Primatologist Frans de Waal is interviewed on the Origin of Religions.