Apache is a free and open-source cross-platform web server software.
Ionicons is an open-source icon set crafted for web, iOS, Android, and desktop apps.
Open Graph is a protocol that is used to integrate any web page into the social graph.
W3 Total Cache (W3TC) improves the SEO and increases website performance and reducing load times by leveraging features like content delivery network (CDN) integration and the latest best practices.
YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.