Apache is a free and open-source cross-platform web server software.
Invenio is an open-source software framework for large-scale digital repositories that provides the tools for management of digital assets in an institutional repository and research data management systems.
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.
MathJax is a cross-browser JavaScript library that displays mathematical notation in web browsers, using MathML, LaTeX and ASCIIMathML markup.