Cowboy is a small, fast, modular HTTP server written in Erlang.
Express is a web application framework for Node.js, released as free and open-source software under the MIT License. It is designed for building web applications and APIs.
Facebook pixel is an analytics tool that allows you to measure the effectiveness of your advertising.
Heroku is a cloud platform as a service (PaaS) supporting several programming languages.
HighLevel is an all-in-one marketing and automation platform designed for marketing agencies and small businesses to manage CRM, marketing campaigns, sales funnels, appointment scheduling, and more.
Open Graph is a protocol that is used to integrate any web page into the social graph.