Apache is a free and open-source cross-platform web server software.
cdnjs is a free distributed JS library delivery service.
Elfsight is an all-in-one platform offering 70+ customisable widgets for websites.
Query Migrate is a javascript library that allows you to preserve the compatibility of your jQuery code developed for versions of jQuery older than 1.9.
jQuery Modal is an overlay dialog box or in other words, a popup window that is made to display on the top or 'overlayed' on the current page.
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.
Unix is a family of multitasking, multiuser computer operating systems.