http://valleywag.gawker.com/smiling-young-white-people-make-app-for-avoiding-black-1617775138 SketchFactor, a racist app made for avoiding "sketchy" neighborhoods, which is the term young white people use to describe places where they don't feel safe... I have posted links to crime rates and gun crime by neighborhood breakdown of cities before. That research takes a lot of time and effort to map what is very closely correlated into one smooth app. Racist, maybe, but useful.