Apache is a free and open-source cross-platform web server software.
Google Analytics is a free web analytics service that tracks and reports website traffic.
jQuery plugin for infinite scrolling.
jQuery is a JavaScript library which is a free, open-source software designed to simplify HTML DOM tree traversal and manipulation, as well as event handling, CSS animation, and Ajax.
KaTeX is a cross-browser JavaScript library that displays mathematical notation in web browsers.
PHP is a general-purpose scripting language used for web development.