Ahoy is a Ruby gem that provides simple and powerful analytics for Ruby on Rails applications.
Cowboy is a small, fast, modular HTTP server written in Erlang.
Elfsight is an all-in-one platform offering 70+ customisable widgets for websites.
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.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.