Google Tag Manager is a tag management system (TMS) that allows you to quickly and easily update measurement codes and related code fragments collectively known as tags on your website or mobile app.
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.
Keap offers an email marketing and sales platform for small businesses, including products to manage customers, customer relationship management, marketing, and ecommerce.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
Open Graph is a protocol that is used to integrate any web page into the social graph.
Simpli.fi is a programmatic advertising and agency management software.
WP Engine is a website hosting provider.
YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.