IPIP representation of NEO-PI-R
International Personality Item Pool (IPIP) representation of the NEO PI-R.

Big Five Mini-Test
Rate a variety of adjectives describing yourself to calculate your Big-5 personality type.

The Big Five Personality Test
A modified online version of the Big 5 test used by U. C. Berkeley psychologist Frank J. Sulloway for birth order research. The test takes about 10 minutes and provides online results.

CrossTraits
A commercial approach to the five factor model.

Find Your Star Wars Twin
Test to determine which Star Wars character is most like you, based on the Five-Factor model of personality.

Five Factor Personality Test
Describes an online version of Goldberg's five-factor personality questionnaire. Includes norms.

SimilarMinds.com - Big Five Personality Test
Free 55 question test.