AddThis is a social bookmarking service that can be integrated into a website with the use of a web widget.
Facebook pixel is an analytics tool that allows you to measure the effectiveness of your advertising.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
OneTrust is a cloud-based data privacy management compliance platform.
Open Graph is a protocol that is used to integrate any web page into the social graph.