AddThis is a social bookmarking service that can be integrated into a website with the use of a web widget.
Elfsight is an all-in-one platform offering 70+ customisable widgets for websites.
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.
PHP is a general-purpose scripting language used for web development.
Priority Hints exposes a mechanism for developers to signal a relative priority for browsers to consider when fetching resources.
RevolverMaps is a collection of real-time visitor statistics widgets for website or blog. Interactive visitor mappings to a globe rendered by the Revolver Engine.
Webnode is a drag-and-drop online website builder.
YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.