Bootstrap Accordion Menu
http://www.wysiwygwebbuilder.com/bootst ... nmenu.html
Bootstrap Navigation Bar
http://www.wysiwygwebbuilder.com/bootst ... onbar.html
Expandable Panel Menu
http://www.wysiwygwebbuilder.com/expand ... lmenu.html
Fullscreen Overlay Menu
http://www.wysiwygwebbuilder.com/fullsc ... ymenu.html
Multi Level Panel Menu
http://www.wysiwygwebbuilder.com/multil ... lmenu.html
Responsive Multi Level Menu
http://www.wysiwygwebbuilder.com/respon ... lmenu.html
Responsive Overlay Menu
http://www.wysiwygwebbuilder.com/respon ... ymenu.html
The demo versions can be downloaded via the Extension Manager (Menu->Tools->Extension Manager->Available).
Note that these are commercial extensions, they are not free! The demo versions are fully functionality, however the properties will not be saved.
The price is $7.95 per extension
It is also possible to purchase all navigation extensions in one package for $29.95 (instead of $55.65)
https://secure.avangate.com/order/produ ... =1&LANG=en