Apache is a free and open-source cross-platform web server software.
cdnjs is a free distributed JS library delivery service.
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.
LazySizes unveilhooks plugin extends lazySizes to lazyload scripts/widgets, background images, styles and video/audio elements.
Lightbox is small javascript library used to overlay images on top of the current page.
Lodash is a JavaScript library which provides utility functions for common programming tasks using the functional programming paradigm.
Unpkg is a content delivery network for everything on npm.