Emulator 'Q' that runs Windows with Macintosh

Not only Windows but also Linux can be emulated on Mac.
Q --Q [kju:]
http://www.kberg.ch/q/index.php?sid=71986&p=0

It looks like this
http://www.kberg.ch/q/index.php?sid=213041&c=6&p=6

It is said that the internet connection is made without any problem via this 'Q'.
It's slow, but it doesn't seem to be too slow to be useful.