How can I show all currently used application of all workspaces in the Gnome 3 taskbar? In Gnome 2 you were able to right click on the bottom left corner to set this as default behavior but I can't find similar settings in Gnome 3.
You can install and run either the xfce4 panel or the mate panel and do this. Yes it runs well at the same time as gnome-shell. Once Wayland hits this might not be the case though.