Pukhraj Suthar

Make your site simple menu to responsive menu. This plugin is convert WordPress menu to simple responsive menu.
Features:
<ul>
<li>Customizable color options for menu by admin side.</li>
<li>Created shortcode of menu, now you can add any where in your website.</li>
</ul>

Simple Responsive Menu

Make your site simple menu to responsive menu. This plugin is convert WordPress menu to simple responsive menu.

salubrio

Intended users: editors, authors, contributors
This plugin will allow you to display the content of subpages as expandable links.
Simply add [subpages_expand] to any parent page. The titles of each of the subpages will be displayed there as clickable links. When the user clicks the link, it will expand, displaying the content of that child page.
Clicking the title again will collapse the content.
<h3>Acknowledgements</h3>
Plugin Icon (CC BY 3.0) by <a href="http://dinosoftlabs.com/" rel="nofollow ugc">DinosoftLabs</a>

Subpage as Expandable Text Shortcode

Add [subpages_expand] to any parent page. All child pages' titles are shown as links that expand to content when clicked

Simple Responsive Menu vs Subpage as Expandable Text Shortcode