Apache is a free and open-source cross-platform web server software.
Debian is a Linux software which is a free open-source software.
Flickity is a JavaScript slider library, built by David DeSandro of Metafizzy fame.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
Modernizr is a JavaScript library that detects the features available in a user's browser.
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.