Skipfish and wapiti are quite a bit different than this. They are simply blackbox scanners that attempt to crawl a webpage and look for common issues, mostly by trial and error. This is examining the source code of an application, finding all the sinks, building a graph, and working backwards through the graph to find sources that can pass input to the vulnerable sinks.
Shameless plug scanner.secapps.com - tests are executed in your browser.
I get a blank page with a couple of console errors when I visit that URL (Safari on OS X)