Apache is a free and open-source cross-platform web server software.
Flickity is a JavaScript slider library, built by David DeSandro of Metafizzy fame.
NextGEN Gallery is a free open-source image management plugin for the WordPress content management system.
PHP is a general-purpose scripting language used for web development.
Unix is a family of multitasking, multiuser computer operating systems.
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.