Facebook pixel is an analytics tool that allows you to measure the effectiveness of your advertising.
Gambio is an all-in-one shopping cart solution for small to medium sized businesses.
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.
YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.