Using this tag you can set up your web app to have an application shortcut icon added to a device's homescreen, and have the app launch in full-screen "app mode".

Content Management System

WordPress

Websites Using WordPress

A semantic personal publishing platform with a focus on aesthetics, web standards, and usability.

Framework

Ruby On Rails

Websites Using Ruby On Rails

Ruby on Rails is an open-source web framework that is optimized for programmer happiness and sustainable productivity. It lets you write beautiful code by favoring convention over configuration.

Document Standard

HTTPS

Websites Using HTTPS

Websites using https protocol.

HTML5 DocType

Websites Using HTML5 DocType

The DOCTYPE is a required preamble for HTML5 websites.

Open Graph Tags

OpenGraph Locale Entity

Websites Using OpenGraph Locale Entity

Open graph locale entity tag

OpenGraph Type Entity

Websites Using OpenGraph Type Entity

Open graph type entity tag

OpenGraph Url Entity

Websites Using OpenGraph Url Entity

Open graph url entity tag

OpenGraph Description Entity

Websites Using OpenGraph Description Entity

Open graph description entity tag

Open Graph Protocol

Websites Using Open Graph Protocol

The Open Graph protocol enables any web page to become a rich object in a social graph, a open protocol supported by Facebook

OpenGraph Site Name Entity

Websites Using OpenGraph Site Name Entity

Open graph site name entity tag

Meta Tags

Theme Color Tag

Websites Using Theme Color Tag

Chrome for Android, since version 39 supports the "theme-color" meta tag to allow websites control the background color of the tab's UI header.

Meta Robot

Websites Using Meta Robot

This page contains a meta robots tag which tells search engines and robots to index or not index the page.

Meta Description

Websites Using Meta Description

Meta descriptions are HTML attributes that provide concise explanations of the contents of web pages. Meta descriptions are commonly used on search engine result pages (SERPs) to display preview snippets for a given page.

Canonical Tag

Websites Using Canonical Tag

A canonical link element is an HTML element that helps webmasters prevent duplicate content issues by specifying the "canonical", or "preferred".

HTML Tags

HTML5 SVG Tag

Websites Using HTML5 SVG Tag

Sites using Html 5 SVG Tag

Encoding

UTF-8

Websites Using UTF-8

UTF-8 (8-bit UCS/Unicode Transformation Format) is a variable-length character encoding for Unicode. It is the preferred encoding for web pages.

Fonts

Typekit

Websites Using Typekit

Typekit is the easiest way to use real fonts on the web. It's a subscription-based service for linking to high-quality Open Type fonts from some of the worlds best type foundries.