AAASP Online - Welcome! — The Association for the Advancement of Applied Sport Psychology 
(AAASP) provides information about Intervention/Performance Enhancement, Health Psychology, and Social Psychology within the context of sports. 
APA Division 47, Exercise And Sport Psychology - Information about the activities of the devision and links to relevant sites.
Sport Competition Anxiety Test - Test yourself.
Sport Psychology Home Page - The home page for Brooke Estabrook's Sports Psychology course.  Several elements are available to the public.