A talk about the best sites to check other platforms

I know the best is to have a mobile or a tablet and a Mac and so one to check what vi make on e-lerarning on other platforms. But I olso know there is a lots of site who can help us, so we not should buy all the stoff ind the beginning.

So let it be a good fresh discussion with good links to that kind of helping sites.

Hire is the first link:

http://quirktools.com/screenfly/