AddThis is a social bookmarking service that can be integrated into a website with the use of a web widget.
AMP, originally created by Google, is an open-source HTML framework developed by the AMP open-source Project. AMP is designed to help webpages load faster.
Google Tag Manager is a tag management system (TMS) that allows you to quickly and easily update measurement codes and related code fragments collectively known as tags on your website or mobile app.
Tengine is a web server which is based on the Nginx HTTP server.
YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.