veradeveloper

This plugin allows you to easily scroll back to the top of the page.
Documentation 
To change global settings, go to “Settings” -> “Wow scroll up”.

Wow scroll up

Simple & easy

This plugin allows you to easily scroll back to the top of the page.

fractal512

Fully adjustable scroll to top tool for your site. Now with SVG icons! 
Easily adapts to any theme. You can change type (button or sidebar), size, shape, icon, color and much more. Dynamically binds to the page and, thus, does not affect SEO. This plugin uses Color Picker jQuery plugin for easy way to change colors of Your button or sidebar. Tested in browsers: Internet Explorer 7 – 11, Microsoft Edge, Safari, Google Chrome, Mozilla Firefox and Opera.
Features:
<ul>
<li>type of scroll tool (button or sidebar);</li>
<li>size and position of the tool;</li>
<li>colors of the button/sidebar;</li>
<li>disable for small mobile screens option;</li>
<li>animated scroll motion option;</li>
<li>translucency of the tool option;</li>
<li>scroll down to the last viewed position option.</li>
</ul>

Scroll tool

Fully adjustable scroll tool for your site.

Wow scroll up vs Scroll tool