You can alt-tab through windows:

http://www.mactip.net/wp-content/uploads/2011/01/macosx_cmd_...

Or activate mission control:

http://www.iphones-apps.ru/wp-content/uploads/2013/12/Screen...

Mission Control overlays the icon and title.

In general the apps seem to be visually distinct and people aren't identifying them by titles anyway:

http://images.apple.com/osx/preview/images/overview_design_h...

Let me know if I misread your question.