TypeLogic - A detailed description of each Myers-Briggs type.
Life Explore - Lots of information on the Enneagram and the Myers-Briggs theory, plus lots of links and list of resources.
The Personality Page - Easy to understand information on Personality Types.
Myers-Briggs - Working out your type - Overloads you with information for the purpose of working out your own Myers-Briggs type.
BLOGinality Personality Test - A four question test, easy and quite accurate.
Jung Typology Test
Adapted & FREE version of Mysers-Briggs & Keirsey Personality Tests
List of heaps of personality tests, both free and otherwise
Keirsey's Temperament Sorter II - Long & Formal