Apache is a free and open-source cross-platform web server software.
MathJax is a cross-browser JavaScript library that displays mathematical notation in web browsers, using MathML, LaTeX and ASCIIMathML markup.
Matomo Analytics is a free and open-source web analytics application, that runs on a PHP/MySQL web-server.
OpenSSL is a software library for applications that secure communications over computer networks against eavesdropping or need to identify the party at the other end.
PHP is a general-purpose scripting language used for web development.
Red Hat is an open-source Linux operating system.
SPIP is a content management system written in PHP that uses one or more databases like SQL, SQLite or PostgreSQL.