Apache is a free and open-source cross-platform web server software.
PHP is a general-purpose scripting language used for web development.
Pure CSS is a set of small, responsive CSS modules that can be used in web projects.
RequireJS is a JavaScript library and file loader which manages the dependencies between JavaScript files and in modular programming.
Ubuntu is a free and open-source operating system on Linux for the enterprise server, desktop, cloud, and IoT.