Website using the ¥ symbol on their website - meaning it may accept payment in this South Korean currency.
Websites embedding Google maps.
Google Tag Manager makes it easy for marketers to add and update website tags including analytics, remarketing, and more.
iOS Safari instructions for mobile web apps
This site uses the viewport meta tag which means the content may be optimized for mobile content.
Embedded videos from YouTube.
nginx [engine x] is a HTTP server and mail proxy server written by Igor Sysoev.
GoDaddy nameserver services
The DOCTYPE is a required preamble for HTML5 websites.
Allows a website to define how a page is rendered in Internet Explorer 8, allowing a website to decide to use IE7 style rendering over IE8 rendering.
Websites using https protocol.
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
Sites who has this tag are verfied by google to use WebMaster tools
The http-equiv attribute provides an HTTP header for the information/value of the content attribute.
The http-equiv attribute can be used to simulate an HTTP response header.