American Psychological Association databases
PsycTests gives you access to thousands of psychological tests, measures, scales, and other assessments as well as descriptive and administrative information. There are both published and unpublished tests developed by researchers but not made commercially available. So you get the purpose; some history of its development; data on the scope of the test, test implementation, a high-level overview of the test’s development, and reliability and validity data (when available). Most records link to a variety of materials describing the test in peer-reviewed literature, technical reports, or dissertations as well as links to related peer-reviewed literature describing test development, review, or use. Most records also include the actual test instrument.