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Updated: April 2024.

English-language sites (selection)

• Atheist Alliance International (AAI) (IBKA is member of AAI)
• Humanists International
• The Brights
• End Blasphemy Laws
• Atheism (UK)
• The National Secular Society (UK)
• Atheist Ireland
• American Atheists (USA)
• Freedom From Religion Foundation (USA)
• Internet Infidels/The Secular Web (USA)
• Richard Dawkins Foundation for Reason and Science (USA/UK)
• The James Randi Educational Foundation (USA)
• Center for Inquiry (USA)
• Atheist Foundation of Australia
• New Zealand Association of Rationalists & Humanists
• Atheist Centre Vijayawada (India, corporate member of IBKA)
• Concordat Watch
• Evil Bible
• The Skeptic's Annotated Bible
• Prometheus Books
• Evolve Fish

For IBKA's complete link collection (mostly in German, also in English and other languages) see here: Links.