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Provides Free shipping to Digital Downloads. Why not use the built-in Free Shipping? Because that is applied to all products in your catalog. This plugin allows you to set Free Shipping by Product Shipping Class, so that other products in your catalog can have shipping costs as well. 
This free shipping is only active if the items in the cart are ALL in this shipping class. Otherwise, your normal shipping methods apply. 
You can see this in the screenshots – as soon as the product that is not in the Digital Free Shipping class (My Boxed Item) is added, the option for free shipping disappears.

WooCommerce Digital Download Free Shipping

Provides Free shipping to Digital Downloads, set by Product Shipping Class.

Calcurates

Overview
Calcurates is a cloud-based entire shipping solution that calculates and shows the right shipping methods and rates to customers at checkout based on multiple conditions. It helps e-commerce to seamlessly integrate with major shipping carriers (DHL, UPS, FedEx, USPS, Purolator, Canada Post and more) in order to display real-time rates at checkout.
Calcurates helps you to reduce the gap between true shipping costs you bear and shipping rates your customers pay at the checkout. Bring your shipping to a new level and make it cost-effective and sales-stimulating.
Features
<ul>
<li>Shipping Zones</li>
<li>Custom Shipping Options (Flat Rate, Free Shipping)</li>
<li>Carrier Shipping Options</li>
<li>Table Rates</li>
<li>Multi-Origin Shipping</li>
<li>Shipping Rules and Restrictions</li>
<li>International Shipping and Landed Costs</li>
<li>Estimated Delivery Dates</li>
<li>In-Store Pickup</li>
<li>Volumetric Weight</li>
<li>Smart Packaging</li>
<li>Rate Shopping</li>
</ul>
Developed By Experts
Calcurates is developed and supported by Amasty. After 10 years of success in developing and supporting e-commerce apps and extensions, the Amasty team is happy to introduce a multi-platform shipping SaaS, which is the perfect solution for shipping profitability.
Additional Benefits
<ul>
<li>Free consultations on e-commerce shipping</li>
<li>Qualified and careful support</li>
<li>Migration and configuration services</li>
</ul>

Calcurates for WooCommerce

An ultimate multi-carrier shipping plugin for e-commerce that helps manage and display the right shipping methods and rates at checkout

WooCommerce Digital Download Free Shipping vs Calcurates for WooCommerce