Justin Tadlock

The Query Posts widget was written to allow users that don’t know their way around PHP to easily show posts in any way they’d like. It’s like having a cool WordPress developer as a friend ready to do your bidding. Seriously.
The widget has over 40 options to choose from. You can list posts by category, tag, custom taxonomies, author, date, time, name, or anything you can imagine. You can choose to show the full content, excerpts, or even a simple list. You can order the posts in all sorts of ways. Oh, and you can even show pages.
This is the widget that keeps users out of the code and gives them the ability to display items on their site how they want.

Query Posts

A WordPress widget that gives you unlimited control over showing posts and pages.

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.

Query Posts vs SF Bootstrap Menu