Apache is a free and open-source cross-platform web server software.
Calendly is an app for scheduling appointments, meetings, and events.
MailChimp for WordPress is an email marketing plugin that enables you to build subscriber lists.
Smart Slider 3 is a responsive, SEO optimised WordPress plugin.
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.