Google APIs are application programming interfaces developed by Google which allow communication with Google Services and their integration to other services.
A rich hosted Exchange environment for every user without having to manage a server.
Stripe is a developer-friendly way to accept payments online and in mobile apps.
Content Security Policy is best used as defense-in-depth, to reduce the harm caused by content injection attacks.
Sites who has this tag are verfied by google to use WebMaster tools
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.