The APA provides information about recent research and testing trends, reviews of published resources, and serves as a good general information site for testing. Their page on Finding Instruments About Psychological Tests (https://www.apa.org/science/programs/testing/find-tests) provides details on how to obtain testing instruments and give guidance on how to use resources to find the testing instruments.
This site offers free, but limited public access to their database. For each instrument in the database, you will find 14 categories of basic information (e.g., author, objective, mode of administration, original language, existing translations, pathology, number of items, etc.).