I'm interested in utilizing the viral marketing tactic of unique short-code URL referral. I can't figure out how this is done - my Google search terms are insufficient. Is there a unique-link referral tracking app that provides this service out-of-the-box?
I don't know if there is an out-of-the-box solution, but being a developer I can tell you one way to implement it. The destination url should be saved in a database table with a given identifier. If your domain was short.ly then the short url would be short.ly?id=someId or short.ly/someId. This would look up the destination url and then redirect by returning some 300/3xx status code.