Chaschdas.js is a project mainly written in ..., it's free.
JS experiments
A test suite to see how the different browsers behave with CORS
gem install sinatraedit /etc/hosts so that
127.0.0.1 test.chaschdasjs.com
127.0.0.1 cors.chaschdasjs.comruby server.rbgo to test.chaschdasjs.com
The idea is to have this application run on a server, so that different browsers can access it. It then would gather the test results and aggregate them on a summary page.