Sidetaker

http://www.sidetaker.com/index.php

I get in arguments on a daily basis. I fight with random strangers on the street. You think the new Kanye West album was shit? REALLY? I'll get in your face about it. No doubt.

Sidetaker gives my arguments (and your arguments) an audience. After both parties tell their sides of the story, the other users weigh in and tell you if you're right or massively in the wrong. They show this with comments and a nice graphic that lays out your level or wrongness (or rightness!) in percentage points.

If only all of our parents had this when we were younger :(