Mega Menu Magento 2 ( http://bit.ly/2a2CTmM ) changes the way main menu displays. It allows you to have multiple options to show what you want on the main navigation.
2. Mega Menu
Is developed and optimized to allow both user and admin manage
effortlessly all information which they want to show on main navigation of
a Magento website such as: categories, products, text contents, images,
video, forms...