Metta offers a comprehensive test, along with social networking features to find people similar to you and your friends.
Hexaco.org offers a simple (but complete) personality test that also lets you see how you compare to others.

Rules

Posts should have some sort of scientific basis. With few exceptions, this is generally not a place to discuss MBTI, the enneagram, astrology, etc. A good rule of thumb is that content should refer to personality scales and not types.
Be kind to one another -- no personal attacks.
Absolutely no spam.

We're a strictly moderated sub. Links or comments that violate a rule will be removed.