Socionics
   An alternate take on the Jungian/Myers-Briggs types; includes physiological descriptions of the types.
   http://www.socionics.com

Socionics Type Assistant
   Socionics-based test to determine Junian Psychological Type.
   http://www.socionicstypeassistant.com/

Socionics: Intertype Relationships
   Socionics is a theory of intertype relationships based on Jungian personality typology.
   http://www.socioniko.net/