Any online. Any test online is not an 'industry standard' and subjected to rigorous peer review and data sampling.
Tests. Tests must be reliable and valid, and copyrighted by law. It is very doubtful that a test having any merit would be available free of charge on the internet. If you find tests this way, be wary of any results.
Online psych tests. Online psychological tests: http://en.Wikipedia.Org/wiki/list_of_diagnostic_classification_and_rating_scales_used_in_psychiatry. You will find has external links to the individual tests, scoring interpretations, and uses of the various tests.