mjar81

This plugin simply changes the default “Write” and “Manage” links in admin to go to pages instead of posts. This is useful if you’re using WordPress primarily as a CMS.

WP Pages Only

This plugin simply changes the default "Write" and "Manage" links in admin to go to pages instead of posts.

anmari

The widget produces a breadcrumb trail through the page tree – a single page from each level of the page hierarchy (no nesting, no indenting). This widget is useful for website that may have fairly deep menu`s and a risk of the user getting “lost”. 
A Default CSS styling is provided, however this can be switched off. It is also possible to add a separator in the HTML markup (instead of just using CSS to style the menu).
Features:
<ul>
<li>Uses listed items with minimal markup. The markup is compatible with twentyseventeentheme html markup and wordpress delivered markup. </li>
<li>Provides default css styling (no spans for separators), with the option to switch the default styling off to use your own. Depending on your existing theme, you may need to adjust your theme`s css. See below.</li>
<li>Allows specification of a separator if you really wish one. This will be inserted into a span within the link text, so the whole area is clickable. If there is no separator (default) then no span html is issued.</li>
</ul>

amr breadcrumb navigation

Produces a breadcrumb trail through the page tree - a single page from each level of the page hierarchy (no nesting, no indenting).

WP Pages Only vs amr breadcrumb navigation