Theodore Millon  
   Millon theory and psychological assessments focuses mainly on personality disorders.
   http://millon.net/

Personality Disorders Information  
   Information about the major personality disorders, from Antisocial to Schizotypal.
   http://personalitydisorders.mentalhelp.net/

About.com - Personality Disorder Resources  
   Information about borderline, antisocial, narcissistic, obesessive-compulsive, and other personality disorders. Offers links to related sites.
   http://www.mentalhealth.about.com/health/mentalhealth/cs/personaltydisordrs/

NPA Personality Theory  
   Personality disorders based on genetic traits (Mendelian) of narcissism, perfectionism, schizophrenia, autism and aggression.
   http://www.homestead.com/abenis2000/

Great Ideas in Personality--Personality Disorders  
   Diagnostic criteria, links, resources, and acronynms of personality disorders.
   http://www.personalityresearch.org/pd.html

New Zealand Association for Psychological Type  
   A network of people interested in personality type. Promotes the constructive use of differences of Psychological type based in C G Jung's theories, primarily the Myers-Briggs type indicator.
   http://www.nzapt.org.nz

Online Screening for Personality Disorders  
   A 20-question online test for personality disorders by Benjamin J. Sadock, M.D. and Waguih William IsHak, M.D. from the New York University School of Medicine, 1995.
   http://www.med.nyu.edu/Psych/screens/pds.html

Personality Disorders Foundation  
   Articles, research, links, bibliographies, and treatment options.
   http://pdf.uchc.edu/

Personality Disorders  
   The medical and clinical aspects of personalty disorders.
   http://www.emedicine.com/med/topic3472.htm

Personality Disorders Community  
   Expert information, support groups, chat transcripts, journals, personality disorders tests, events, and recommended reading.
   http://www.healthyplace.com/Communities/Personality_Disorders/Site/

Merck Manual Personality Disorders  
   The Merck Manual of Diagnosis and Therapy Psychiatric Disorders - Personality Disorders.
   http://www.merck.com/pubs/mmanual/section15/chapter191/191a.htm

P.D. Jamboree  
   Information, resources, and case studies regarding ten personality disorders.
   http://www.pdjamboree.healthyplace2.com/index.html

Yahoo! Health - Personality Disorders  
   Personality tests, traits & temperaments, personality disorders, in the workplace and other environments.
   http://health.yahoo.com/health/centers/personality/96334822

Monitor on Psychology Personality Disorders  
   APA's Monitor on Psychology special issue dedicated to personality disorders.
   http://www.apa.org/monitor/mar04/persontoc.html

ISSPD - International Society for the Study of Personality Disorders  
   Supports scholarship, clinical experience, international collaboration and communication of research on all aspects of personality disorders including both diagnosis, course and treatment.
   http://www.isspd.com/index.html

Open Site: Personality Disorders  
   Clinical data, diagnostic criteria, and overview of current research.
   http://open-site.org/Health/Conditions_and_Diseases/Psychiatric_Disorders/Personality/

PTypes Personality Types  
   A systematic classification, with summaries of the characteristics as well as quotations and abstracts.
   http://www.ptypes.com/