Create an options page with checkboxes to disable dates in DatePicker.
Defer WooCommerce emails for a specified time after the normal delivery time.
Add an email address (or two) as BCC to all WooCommerce emails.
Conditionally remove the ‘Add to cart’ button in WooCommerce.
Use CMB2 to add a custom metabox to WooCommerce product then add data to Additional Information tab on product page.
Attach a file to the WooCommerce Order Completed email if a specific product or variation is in the order.