Senff - a11n

<h4>Summary</h4>
The Smooth Page Scroll Up/Down Buttons plugin for WordPress adds buttons to every page of your site, that can be used to (smoothly) scroll up or down exactly one screen/page at a time. This can be particularly handy for pages with a lot of text/content, or in cases wherever a browser’s scrollbar is just not good enough (or not present at all, like on tablets) to enable one-click, one-screen scrolling.
BONUS BUTTON! Optionally, you can add a “Back to top” button, that will take the visitor right back to the very top of the page.
No knowledge of any coding (HTML, CSS, JavaScript, PHP) is required at all.
<h4>Features</h4>
<ul>
<li>Button positioning: choose between three options of where you want the buttons to appear — next to eachother at the bottom right, on top of eachother at the bottom right, or one at the top right and the other at the bottom right.</li>
<li>Scrolling distance: scroll a full page with each click, half a page, or however far you want.</li>
<li>Button size: choose the size of the buttons.</li>
<li>Scrolling speed: set the speed at which pages should scroll from one page to another.</li>
<li>‘Back to top’ button: optionally, include an additional button that takes the user back to the very top of the page.</li>
</ul>

Smooth Page Scroll Up/Down Buttons

Smooth Scroll Page Up/Down Buttons adds buttons that enables your site visitors to easily scroll up or down one screen/page at a time.

sjozsef

YASS – Yet Another Smooth Scroll plugin for WordPress. Just install and enjoy the smoothest scrolling you ever seen!
Features:
<ul>
<li>Customizable animation parameters</li>
<li>Support for keyboard and touchpad scrolling (optionally)</li>
<li>Ability to fix your background image</li>
<li>Multilanguage (translators needed)</li>
</ul>
Credits:
<ul>
<li>This plugin is built on <a href="https://github.com/galambalazs/smoothscroll-for-websites" rel="nofollow ugc">SmoothScroll</a> by <a href="https://github.com/galambalazs" rel="nofollow ugc">galambalazs</a>. </li>
<li>Based on <a href="https://github.com/DevinVinson/WordPress-Plugin-Boilerplate" rel="nofollow ugc">WPPB</a> – Generated with <a href="http://wppb.me/" rel="nofollow ugc">WPPB Generator</a></li>
<li>Sliders on settings page created with <a href="http://loopj.com/jquery-simple-slider/" rel="nofollow ugc">jQuery Simple Slider</a></li>
<li>Icon fonts were generated with <a href="https://icomoon.io/app/" rel="nofollow ugc">IcoMoon</a></li>
<li>Plugin author & maintainer: <a href="http://sjozsef.com" rel="nofollow ugc">sjozsef</a></li>
</ul>

Yet Another Smooth Scroll

Just works great!

Customisable SmoothScroll plugin for WordPress

Smooth Page Scroll Up/Down Buttons vs Yet Another Smooth Scroll