Lakatos
LSE's tribute to his 80th birthday. Includes his "Science and Pseudo-Science" lecture.

Paul Feyerabend
Encyclopaedic appraisal of this major opponent of scientific optimism.

The Karl Popper Web
Very biased but interesting analysis of Popper's major works. Includes chat forums.

Philosophical Foundations of Physics
Probably the most important chapters from Rudolph Carnap's book, reproduced courtesy of Marxists.org

Philosophy of Science Resources
A wonderful collection of links collected by Augustana University College.

Science as Culture
A lively, though scholarly, e-magazine covering all aspects of scientific culture.

The Structure of Scientific Revolutions
An outline, by Professor Frank Pajares, of Thomas Kuhn's influential book.