For people interested in learning more about themselves through testing, there now exists at least one great site on the web where you can learn more about yourself from a well-established test, free of charge. The available test is a measure of the Big Five -- five personality traits that are often said to describe personality structure in relation to major traits. (To see more about personality structure, click here for the main selection on this web site.) Click here to go to the site associated with the International Personality Item Pool, at which you can take the Big Five test and receive feedback.
Alan Reifman has generously compiled an on-line directory of personality and social psychological measures, available at this web address. The site requires a little work, but the instruments -- and the site -- are very valuable.
Samual Gosling (a prominent personality psychologist) and his colleagues have introduced a new social perception web site. You can judge others and get judged by others on a range of personality traits; the web site will then generate feedback on how you are seen and how accurately you see others. Check it out here. The researchers' ultimate goal is to use it to examine various parameters of judgment (e.g., who's a good judge, who's a good target, etc.)
I have recently discovered a good web page called PsychWeb which has a page for tests and assessments. The scales they present are mostly good (and sometimes better than that). They include brief descriptions of the indivdiual tests as well. If you are interested in taking some tests, I would recommend taking a look at that page; to do so, click here.
My emotional intelligence web site has a page for announcements. Sometimes, researchers will offer you the opportunity to take an emotional intelligence test for free, with feedback. You can check if such a study is being conducted by clicking here.