Constant Contact is a marketing automation and email marketing solution.
Facebook pixel is an analytics tool that allows you to measure the effectiveness of your advertising.
Glide.js is a dependency-free JavaScript ES6 slider and carousel.
Google Hosted Libraries is a stable, reliable, high-speed, globally available content distribution network for the most popular, open-source JavaScript libraries.
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.
JSDelivr is a free public CDN for open-source projects. It can serve web files directly from the npm registry and GitHub repositories without any configuration.
Microsoft Ajax Content Delivery Network hosts popular third party JavaScript libraries such as jQuery and enables you to easily add them to your web applications.
Open Graph is a protocol that is used to integrate any web page into the social graph.