Apache is a free and open-source cross-platform web server software.
Cloudflare Browser Insights is a tool that measures the performance of websites from the perspective of users.
Google PageSpeed is a family of tools designed to help websites performance optimisations.
Jetpack Boost – Website Speed, Performance and Critical CSS.
Open Graph is a protocol that is used to integrate any web page into the social graph.
PayPal is an online payments system that supports online money transfers and serves as an electronic alternative to traditional paper methods like checks and money orders.
PHP is a general-purpose scripting language used for web development.
Priority Hints exposes a mechanism for developers to signal a relative priority for browsers to consider when fetching resources.
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.