CloudFlare is a global CDN and DNS provider that can speed up and protect any site online.
Google APIs are application programming interfaces developed by Google which allow communication with Google Services and their integration to other services.
Content Security Policy is best used as defense-in-depth, to reduce the harm caused by content injection attacks.
The Open Graph protocol enables any web page to become a rich object in a social graph, a open protocol supported by Facebook
Google's hosted library for web fonts. Allows websites to choose and use fonts from a free, wide variety of fonts.