vendidero

This Plugin ensures that your WooCommerce customers are forced to benefit from free shipping if method is available during checkout. 
Free shipping will be automatically selected and all other methods are being temporarily disabled.

WooCommerce Force Free Shipping

Automatically selects and forces free shipping within WooCommerce cart and checkout if is applicable.

pimwick

Let’s say your customer has the following products in their cart:
<ol>
<li>Paper Airplane</li>
<li>Box of playing cards</li>
<li>A Grand Piano</li>
</ol>
You offer “free shipping for orders over $50” but you specify that some restrictions apply.
Naturally the Grand Piano will cost quite a bit to ship so you don’t want to offer free shipping on this order.
With this plugin, the Grand Piano can be marked “Exclude Free Shipping” which means the user will pay for shipping of this unique item. See screenshots for a visual example.
Works for Simple Products, Variable Products, and even Variations!
I have many products that I need to update. How can I do this quickly? 
This plugin is compatible with our <a href="https://pimwick.com/pw-bulk-edit" rel="nofollow ugc">PW WooCommerce Bulk Edit Pro</a> plugin. 
Quickly update the products that should be excluded from the Free Shipping offer.
<blockquote>
Like this free plugin? 
 Check out our most popular plugin <a href="https://wordpress.org/plugins/pw-woocommerce-gift-cards/" rel="ugc">PW WooCommerce Gift Cards</a>. 
 We also offer many other <a href="https://pimwick.com/pw-plugins" rel="nofollow ugc">Free and Premium Plugins</a> to help your WooCommerce store!
</blockquote>

PW WooCommerce Exclude Free Shipping

This plugin does exactly what it says and does it beautifully. Thank you very much.

Quick, easy, simple. Just what I was looking for.

Does exactly what it says!

Specify products that cause Free Shipping to not be available when they are in the cart.

WooCommerce Force Free Shipping vs PW WooCommerce Exclude Free Shipping