We first mentioned the Similar Minds site a few years ago, and it looks as though they’ve now added more tests and categorised things better. There’s also a forum now, so you can chat away with like minded seeker types. Anyhoo, this is a great destination if you’re looking to find the ‘real you’, if you get what we mean. A whole bunch of free personality tests, some detailed, some short. A cool collection, but beware, you might discover more about yourself than you can handle!
SimilarMinds.com is a resource for personality tests and personality psychology. Currently, there are a number of personality tests online (Enneagram test, Advanced Enneagram, Compatibility test, Jung, Big 5, Word Association, and others). There is also Ask The Oracle which is a decision making tool. All the tests at SimilarMinds.com are developed based on scientific measures used to ensure test validity. Statistical measures are used to ensure test questions measure what they are intended to measure. Some of the free tests are experimental versions but even those tests are made up of pre-tested and validated questions. For more test info click here. I periodically change the test questions (based on my ongoing research) so check back and retake the tests on occasion.