I use https://extensions.gnome.org/extension/413/dash-hotkeys/ https://extensions.gnome.org/extension/413/dash-hotkeys/ thing for Unity like single shortcut Win

I use https://extensions.gnome.org/extension/413/dash-hotkeys/ https://extensions.gnome.org/extension/413/dash-hotkeys/ thing for Unity like single shortcut Window switcher. It is absolute life saver. I used to use apptivate(http://www.apptivateapp.com/ http://www.apptivateapp.com/) on OSX for same thing. Is there a elementary alternative? A quick google search doesn't turn up anything.