HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
Jetpack is a popular WordPress plugin created by Automattic, the people behind WordPress.com.
MailChimp for WordPress is an email marketing plugin that enables you to build subscriber lists.
Modernizr is a JavaScript library that detects the features available in a user's browser.
Open Graph is a protocol that is used to integrate any web page into the social graph.
Vercel is a cloud platform for static frontends and serverless functions.
WordPress is a free and open-source content management system written in PHP and paired with a MySQL or MariaDB database. Features include a plugin architecture and a template system.