You can now buy Divi child themes, layouts, and plugins in the official Divi marketplace run by Elegant Themes.
A Divi Theme website example for Hype Marketing, an integrated marketing agency in the UK.
This website uses the following WordPress plugins;
Contact Form 7
WP Super Cache
Logos Showcase - Multi-Use Responsive WP Plugin
Rotating Tweets (Twitter widget and shortcode)
Responsive FlipBook Plugin