Apache is a free and open-source cross-platform web server software.

Varnish is a reverse caching proxy.

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.

Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.

MySQL is an open-source relational database management system.

Query Migrate is a javascript library that allows you to preserve the compatibility of your jQuery code developed for versions of jQuery older than 1.9.

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.

WooCommerce is an open-source ecommerce plugin for WordPress.

Google AdSense is a program run by Google through which website publishers serve advertisements that are targeted to the site content and audience.

PHP is a general-purpose scripting language used for web development.

jQuery is a JavaScript library which is a free, open-source software designed to simplify HTML DOM tree traversal and manipulation, as well as event handling, CSS animation, and Ajax.

Google Analytics is a free web analytics service that tracks and reports website traffic.

WooCommerce PayPal Payments is a latest WordPress plugin with most complete payment processing solution. Accept PayPal exclusives, credit/debit cards and local payment methods.

Site Kit is a one-stop solution for WordPress users to use everything Google has to offer to make them successful on the web.