Asvin Balloo

This plugin will add a “Back to top” icon automatically to your blog. It features a smooth scrolling effect and customizable options such as the color, position and scroll duration, sprinkled with some cool CSS3 effect.
By <a href="http://htmlblog.net/" rel="nofollow ugc">Asvin Balloo</a>.
Supported features:
<ul>
<li>Smooth scrolling animation</li>
<li>Customizable options via the admin panel</li>
<li>Works on almost all browsers</li>
<li>No need to add any markup to your theme</li>
</ul>

WP To Top

This plugin will add a "back to top/ scroll to top" icon automatically to your blog.

paulund

This WordPress plugin will create a button in the bottom right corner of your site to scroll back to the top of the page.
The button will always be in the bottom right and styled like the scroll to top button as on Pinterest.
<h3>Arbitrary section</h3>

Paulund Pinterest Scroll To Top

This Wordpress plugin will create a button in the bottom right corner of your site to scroll back to the top of the page

WP To Top vs Paulund Pinterest Scroll To Top