You can now buy Divi child themes, layouts, and plugins in the official Divi marketplace run by Elegant Themes.
An Is it Divi? Theme Example for Coffee Beans Delivered, an Australian business supplying coffee beans. A very clever design and layout on this woocommerce coffee beans store.
The following plugins were used on this Divi website;
WordPress SEO by Yoast
Q And A Focus Plus Faq