Alex Sawallich

<p>This plugins enables the famous Google +1-button in your wordpress-installation. The button is shown beneath<br />
your posts/pages. With this button you can share the permalink to your post/page in your Google+ profile.</p>
<p>You’ve got the possibility to change the look of the button in the same manner, that you can do by using the<br />
configurator that Google provides: see <a href="http://www.google.com/webmasters/+1/button/" rel="nofollow ugc">Google plus one</a>.</p>


Google+ One Button

Provides a +1 button from Google+ beneath each post/page.

RLDD

<p>Add plus and minus quantity buttons to the WooCommerce Legacy Cart (does not support cart blocks).</p>
<h4>Special Features</h4>
<ul>
<li>Responsive design for mobile</li>
<li>Generic aesthetic that integrates with your storefront design</li>
<li>Zero setup and configuration, just install and activate the plugin</li>
<li>No impact to WooCommerce templates</li>
<li>Easily controlled with CSS class: .woocommerce button.qty</li>
</ul>


Quantity Buttons for WooCommerce

Add plus and minus quantity buttons to the WooCommerce Legacy Cart (does not support cart blocks).

Google+ One Button vs Quantity Buttons for WooCommerce