Japan Popper Society
- Brief biographical information, as well as history of the organization, its newsletters, and related links.
- http://www.law.keio.ac.jp/~popper/popperindex-e.html

Critical Cafe
- Yahoo! group devoted to discussing the philosophy of Karl Popper.
- http://groups.yahoo.com/group/Critical_Cafe/

Popper and the Philosophy of Education
- Article by John Halliday, from the Encyclopedia of Philosophy of Education. Pursues Popper's lessons with regard to educational research as well as pedagogy.
- http://www.vusst.hr/ENCYCLOPAEDIA/popper_and_the_philosophy_of_edu.htm

The Ethical Roots of Karl Popper's Epistemology
- Paper by Mariano Artigas. A detailed study of the underlying motivations for Popper's approach to epistemological problems.
- http://www.nd.edu/Departments/Maritain/ti/artigas.htm

Sir Karl Popper (1902-1994)
- A brief article on this thinker, discussing the relation of Popper to the Friesian school of Kantian philosophy.
- http://www.friesian.com/popper.htm

The Popper Newsletter Archive
- Includes some online issues and background information on this newsletter, established in 1983.
- http://www.eeng.dcu.ie/~tkpw/newsletter/

Karl Popper Links and Resources
- Quotes and extensively annotated links relating to the philosopher. Part of Lachlan Cranswick's personal homepage.
- http://lachlan.bluehaze.com.au/popper.html

Karl Popper 2002 Centenary Congress
- Scholarly conference in memory of the hundredth year since Popper's birth. Call for papers, program, general information.
- http://www.univie.ac.at/karlpopper2002/

Karl Popper Institute
- Devoted to the promotion, critical analysis and further development of Popper's philosophy and world views. Site features information both on the philosopher and on the Institute's activities.
- http://www.univie.ac.at/science-archives/popper/

Return to Reason: Popper's Thought in Public Life
- Essay concerned with departures from reason in the conduct of public and practical affairs, by Roger James.
- http://website.lineone.net/~roger_james/

Karl Popper
- An intellectual biography of Karl Popper by Stephen Thornton. Includes a summary of three major challenges to Popper's theory of knowledge and how he responded to them.
- http://www.ul.ie/~philos/vol1/popper.html

Stanford Encyclopedia of Philosophy: Karl Popper
- Entry from the Encyclopedia contains a broad assessment of the most important themes in his work.
- http://plato.stanford.edu/entries/popper/

Karl Popper Web
- Dedicated to the defense of science and the exploration of this philosopher's works.
- http://www.eeng.dcu.ie/~tkpw/