Amazon S3 or Amazon Simple Storage Service is a service offered by Amazon Web Services (AWS) that provides object storage through a web service interface.
Apache is a free and open-source cross-platform web server software.
Joomla is a free and open-source content management system for publishing web content.
Mailchimp is a marketing automation platform and email marketing service.
PHP is a general-purpose scripting language used for web development.
UIKit is the framework used for developing iOS applications.
Varnish is a reverse caching proxy.