Mensy

This widget takes all the links and put them in a drop-down select instead of displaying them as links scattered all over the sidebar.

Your WordPress menu automatically becomes a touch-friendly dropdown on mobile devices.

The Responsive Select Menu plugin automatically turns any WordPress 3 Menu into a select box / dropdown on mobile devices.

A very lightweight plugin that removes jQuery Migrate script from your WordPress site's front end.

Makes image maps responsive by packaging the RWD Image Maps jQuery plugin for use in WordPress.

Groovy Menu is a Free responsive Mega Menu plugin that will allow you easily to add an awesome menu on your site and improve website navigation.