This WYSIWYG Web Builder extension is a responsive menu that takes up the entire screen when expanded. The semi-circle trigger button is ‘sticky’, which means that it is always visible at the bottom of the browser window. Clicking the button will animate the menu from the center of the button. The hamburger icon supports 12 transformations.
Demo:
http://www.wysiwygwebbuilder.com/support/stickyfullscreenmenu.html
