National Sex Offender Public Website
It contains links to the sex offender registry websites of different jurisdictions. That site is designed with the public, not webmasters, in mind. We could build a collection of links for the public, but they are able to do a much better job than we ever could, so why not visit that site.
Special note to webmasters:
You are in business to make money. Even if you are not legally required to add warnings about misuse of the information, you probably will make as much money if you include the warnings, links to the government websites, and notices about how yours is a privately owned website.
How to scrape the Alabama registry
District of Columbia download
North Carolina download