pixxxels.org — free adult image hosting
Stripe is a developer-friendly way to accept payments online and in mobile apps.
CloudFlare is a global CDN and DNS provider that can speed up and protect any site online.
iOS Safari instructions for mobile web apps
This site uses the viewport meta tag which means the content may be optimized for mobile content.
The DOCTYPE is a required preamble for HTML5 websites.
Websites with FAQ page
Open graph url entity tag
The Open Graph protocol enables any web page to become a rich object in a social graph, a open protocol supported by Facebook
Open graph image entity tag
UTF-8 (8-bit UCS/Unicode Transformation Format) is a variable-length character encoding for Unicode. It is the preferred encoding for web pages.
Wesites using favicon rel tag
A canonical link element is an HTML element that helps webmasters prevent duplicate content issues by specifying the "canonical", or "preferred".