bjuriewicz

Free SMS for WooCommerce is a plugin that sends SMS notifications (when, for example, you change the order status to completed) directly from your phone, using dedicated open-source Android app.
features: 
* 30 messages/month for free 
* $2 monthly for unlimited messages, or you can spin up your own service and have it for free (see the plugins website for more details). 
* No contracts and additional fees 
* Send different messages to different countries 
* Or just send messages to your country only 
* Send messages when order is placed, completed, cancelled, delayed and more

Free SMS for WooCommerce

Free SMS for WooCommerce is a WooCommerce plugin that sends SMS notifications directly from your phone, using dedicated Android app.

Xoxzo Inc.

This plugin triggers sms and voice call using xoxzo telephony service. 
Some triggers are based on woocommmerce email events.
The following are events that trigger sms/voice notification:
<ol>
<li>New order
<ul>
<li>Pending to processing/completed/on-hold </li>
<li>Failed to processing/completed/on-hold </li>
</ul>
</li>
<li>Cancelled order
<ul>
<li>Processing to cancelled</li>
<li>On-hold to cancelled</li>
</ul>
</li>
<li>Failed order
<ul>
<li>On-hold to failed</li>
<li>Pending to failed</li>
</ul>
</li>
<li>Order on-hold
<ul>
<li>Pending to on-hold</li>
<li>Failed to on-hold</li>
</ul>
</li>
<li>Processing order
<ul>
<li>Failed to processing</li>
<li>On-hold to processing</li>
<li>Pending to processing</li>
</ul>
</li>
<li>Completed order</li>
<li>Fully refunded order</li>
<li>Partially refunded order</li>
<li>Low stock</li>
<li>No stock</li>
<li>Order details(Resending order information)</li>
<li>Customer note</li>
<li>Reset password</li>
<li>New account</li>
</ol>

Xoxzo – SMS and voice notification plugin for WooCommerce

This plugin triggers sms and voice call using xoxzo telephony service.

Free SMS for WooCommerce vs Xoxzo – SMS and voice notification plugin for WooCommerce