TypeLogic  
   Detailed profiles of the 16 psychological types. Supports a very active email discussion group on psych type.
   http://www.typelogic.com/

Team Technology  
   Large number of articles about Myers-Briggs and team building. Team Technology is a training consultancy that specialises in team building, leadership development and interpersonal skills training, in which they make extensive use of the MBTI and Jungian
   http://www.teamtechnology.co.uk/

Association for Psychological Type  
   An organisation focusing on the teaching and training of individuals using the MBTI.
   http://www.aptcentral.org/

High Performance Systems  
   Articles on Type.
   http://www.hpsys.com/personality.htm

The Personality Page  
   Take the Personality Questionnaire and discover your four-letter type. Learn how type affects your career, relationships, and personal growth.
   http://www.personalitypage.com/

Personality Development  
   Informal review of Myers Briggs types and the dynamics of personality development.
   http://members.tripod.com/~PersonalityInstitute/Personality1.htm

Personality Pathways  
   Articles and resources on applications of the MBTI, Myers-Briggs concepts, and psychological type to management, teamwork, leadership, communication, and personal growth and development
   http://www.PersonalityPathways.com/

Center for Applications of Psychological Type  
   Offers qualifying, certification, and advanced education training for the Myers-Briggs Type Indicator personality assessment tool. Publishes books, materials, and other instruments related to the MBTI and psychological type.
   http://www.capt.org/

Typology.Net  
   A graphical guide to the Four Temperaments and 16 MBTI Personality Types. Presents pictographs of each personality type.
   http://www.typology.net/

Psychological Types  
   A Fresian analysis of the theory of the psychological types, with an extension into political philosophy.
   http://www.friesian.com/types.htm

Lifexplore  
   Personal page with information and links to Myers-Briggs and Enneagram resources.
   http://www.geocities.com/lifexplore/index.html

Fundamental Nature of the MBTI  
   Explores the underlying Jungian principles behind the Myers-Briggs Type Indicator.
   http://www.geocities.com/player2000gi/jungian_functions.htm

The Enneagram and the MBTI  
   A periodical on the relationship between the two systems. Interviews, papers on theory, current studies, book reviews, tests, features on art/writing and personality type.
   http://tap3x.net/EMBTI/journal.html

The Introverted Coach  
   Assistance in career, relationships, school, and dating for introverts.
   http://www.theintrovertzcoach.com

Psychological Type and Christian Faith  
   Research from the Practical Theology Unit at the University of Wales, Bangor, UK.
   http://www.bangor.ac.uk/rs/pt/type/definition.php

Measuring the MBTI and Coming Up Short  
   An essay about the lack of validity and reliability of the MBTI. [PDF]
   http://bpo.indiana.edu/bpo-cgi/HRMWebsite/hrm/articles/develop/mbti.pdf

Temperament and Attention Deficit Disorder  
   The relationship between MBTI temperament types and ADD.
   http://borntoexplore.org/addtemp.htm