Darshan Sawardekar

<p>Adds a Scroll To Top button that allows visitors to scroll back to the<br />
top of the page. You can customize the button style using predefined<br />
styles or by adding a custom CSS file in your Theme.</p>
<h3>Credits</h3>
<ul>
<li>Thanks to <a href="http://markgoodyear.com/" rel="nofollow ugc">Mark Goodyear</a> for <a href="http://markgoodyear.com/2013/01/scrollup-jquery-plugin/" rel="nofollow ugc">scrollUp</a>.</li>
</ul>


wp-scroll-up

Adds a Button to Scroll back to Top of any Post or Page in WordPress.

Sayful Islam

<p>The plugin adds a floating navigation button right bottom in the footer of your site that only appears when you scroll the page down, and when clicked gently roll the site to the top. All this without any modification to your template.</p>
<h4>Full Feature Set</h4>
<ul>
<li>Very lightweight, Total content is less than 1 kb and load when the site load</li>
<li>No dependency, Written in Vanilla JavaScript</li>
<li>Support all major browsers including Firefox, Chrome, Opera, Edge, IE9 and higher</li>
<li>Five SVG icon type</li>
<li>Two icon shape: Square or Circle</li>
<li>Unlimited Colors for background and icon</li>
</ul>


Scroll Back To Top Button

This is just a very simple plugin to have a scroll back to top button throughout your whole blog/site.

wp-scroll-up vs Scroll Back To Top Button