Critical Cafe: Yahoo! group devoted to discussing the philosophy of Karl Popper.
Critical Rationalism Group Forum: Online group attempting to continue philosophy in the Popperian mold. Features email list and archive, as well as extensive related links.
Introduction to Karl Popper: Nuanced discussion of the various aspects of this philosopher's legacy.
Japan Popper Society: Brief biographical information, as well as history of the organization, its newsletters, and related links.
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.
Karl Popper 2002 Centenary Congress: Scholarly conference in memory of the hundredth year since Popper's birth. Call for papers, program, general information.
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.
Karl Popper Links and Resources: Quotes and extensively annotated links relating to the philosopher. Part of Lachlan Cranswick's personal homepage.
Karl Popper Web: Dedicated to the defense of science and the exploration of this philosopher's works.
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.
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.
Sir Karl Popper (1902-1994): A brief article on this thinker, discussing the relation of Popper to the Friesian school of Kantian philosophy.
Stanford Encyclopedia of Philosophy: Karl Popper: Entry from the Encyclopedia contains a broad assessment of the most important themes in his work.
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.
The Popper Newsletter Archive: Includes some online issues and background information on this newsletter, established in 1983.