WordPress Hovercards is a lightweight plugin that integrates hovercards for your WordPress posts & pages.
Add to All is a powerful plugin that will allow you to add custom code or CSS to your header, footer, content, or feed.
Contextual Related Posts helps you increase reader retention and reduce bounce rates by displaying a set of related posts on your website or in your feed.
FoxyPress is a custom plugin made to integrate FoxyCart e-commerce functionality into your WordPress website.
Jetpack supercharges your self-hosted WordPress site with the awesome cloud power of WordPress.com.