An organisation I've been closely following has started something called False Allegations Database.

It's available at: https://falseallegations.org.uk and it's for UK/US people.

In a similar way to https://offenders.org.uk they want a database that documents false sexual allegations, seeing as offenders.org.uk documents those deemed guilty, and I think it's an excellent idea. If you've been victim of a false allegation, it would help your online reputation to have your experience documented there.