The APA Science Directorate helps users "to locate the right test " and provides information on psychological tests. It also provides "guidance in using available resources to find psychological tests" and "answers to frequently asked questions."
"The Test Collection at ETS is a database of more than 25,000 tests and other measurement devices most of which were created by authors outside ETS. It makes information on standardized tests and research instruments available to researchers, graduate students and teachers. With information about tests from the early 1900s to the present, the Test Collection at ETS is the largest compilation of such materials in the world."