Hello,

I know DisplayFusion is focused on multi-monitors features, but I think this feature could be very nice and attract a lot of people, due to lack of this kind of software for win on the internet

It's an improvement of the alt+tab

The idea is :
you have your windows stacked by application ; you switch between apps with alt+tab, and you swith between windows of the same app with alt+backstick (or alt+² on AZERTY keyboard for example)

And the best would be a good clean overview like this :
http://andrewpearson.org/andrewpearson/wp-content/uploads/Screenshot-from-2013-11-11-164003.png

Have a nice day (y)

If you do this, please make the actual shortcut user-configurable rather than set. DVORAK user here.