www.wysiwygwebbuilder.com

The Responsive Drop Down Menu is a responsive, multi-level menu optimized for desktop computers and mobile (touch) devices. On desktop computers the menu will display a standard drop down menu and on mobile devices it will display a multi-level stacked menu with the common ‘hamburger’ icon.

http://www.wysiwygwebbuilder.com/responsivemenu.html



You can download the new extension via the Extension Manager (Menu->Tools->Extension Manager->Available).
Please read the help!