Run IE9 in VirtualBox for Free!

I’m a long time Linux user, and one of the pain points of doing any sort of browser development is cross browser testing. I came across this cool Github script that pulls Microsoft’s freely available Virtual PC images for different IE version and sets them up for VirtualBox, which can be used on OSX or Linux. You can find the script and instructions here: https://github.com/xdissent/ievms