Sigmund Freud (1856-1939)

Sigmund Freud and the Freud Archives from the The New York Psychoanalytic Institute and Society

Sigmund Freud from the Internet Encyclopedia of Philosophy

Sigmund Freud from C. George Boeree's E-textbook on personality theories

Sigmund Freud from Michael E Nielsen's Psychology of Religion site

The Web Editor's comments: any academic study of Freud should include some of the criticism that has been increasingly appearing in recent times. A good collection of this can be found in Unauthorized Freud, edited by Frederick Crews (Penguin Books).