dmallon

The Post To Sidebar plugin makes it easy to display post content in the sidebar areas of your site. Once the widget is activated, a multi-select dropdown of all your published pages appears on post editing screens. Select the pages upon which you want the post to be displayed and the post will appear on those pages.
There are options to hide the post title in the output and to show the content as an excerpt.

Post To Sidebar

A WordPress plugin/widget that gives you the ability to put content (posts and custom post types) in your sidebar.

Studiofreya

SF Bootstrap Menu is an easy customizable widget to show hierarchical pages. The menu uses the latest Bootstrap 3.0 framework and provides responsive design for desktops, phones and tablets.
<a href="https://studiofreya.com/wordpress/sf-bootstrap-menu/" rel="nofollow ugc">Plugin website</a>
The plugin allows the user to insert the widget into any widget area.
<h4>Features:</h4>
<ul>
<li>Choose between Horizontal and Vertical menu in each widget instance</li>
<li>New child pages are added to the menu automatically</li>
<li>Select your own colors</li>
<li>Select which parent pages to include into the menu or show all</li>
<li>Exclude pages</li>
<li>Multiple menu instances with different parent pages</li>
<li>Supports up to 3 levels</li>
<li>Mute top-level pages 
‘ Show top-level pages only</li>
<li>Expanded vertical menus. These can be used for online books like our <a href="https://studiofreya.com/cpp/concepts/" rel="nofollow ugc">C++ Concepts book</a>.</li>
</ul>

SF Bootstrap Menu

Responsive sidebar menu wdiget for hierarchical pages with Bootstrap 3.0.

Post To Sidebar vs SF Bootstrap Menu