ETS
The Educational Testing Services has a collection of tests and information pertaining to tests in their test collection. This is a good list of potential tests, but linking through to the tests (or other information) does not work well. What you can do is use this resource to find the title of a test, then search for that test in the databases such as HAPI, Mental Measurements, PubMed, etc.
The example below shows a search on the words trust physician.
