wooassist

This plugin adds a custom field in the checkout page to ask your customers where they heard about your store.
This plugin also offers an “Other” field where your customer can provide a specific answer in a separate textbox.
Features:
<ul>
<li>Easily change the labels and choices for the custom field in the checkout page.</li>
<li>View reports on the “Reports” section in WooCommerce.</li>
<li>Enable/disable the custom field to be required on checkout.</li>
<li>Enable/disable the “Other” field.</li>
<li>Modify order statuses you want to include in the reports.</li>
<li>Export Orders with Customer Source field</li>
</ul>

Where Did You Hear About Us Checkout Field for WooCommerce

Adds a custom field in the checkout page to ask your customers where they've heard about your store.

quadlayers

<a href="http://quadmenu.com/storefront/" rel="nofollow ugc">Demo</a> <a href="https://github.com/quadlayers/storefront-footer/" rel="nofollow ugc">Github</a>
This plugin allows you to easily edit and change the footer credit and copyright text in the WooCommerce Storefront theme through the wordpress admin panel.
Works only with <a href="https://wordpress.org/themes/storefront" rel="ugc">Storefront Theme</a>.

Change Storefront Footer Copyright Text

Very helpful little plugin to change the standard storefront footer and works perfectly.

Useful

Change the footer credit text for Storefront theme.

Where Did You Hear About Us Checkout Field for WooCommerce vs Change Storefront Footer Copyright Text