Modernizr is a JavaScript library that detects HTML5 and CSS3 features in the user’s browser and allows you to target specific browser functionality in your stylesheet.

Mobile

Apple Mobile Tags

Websites Using Apple Mobile Tags

iOS Safari instructions for mobile web apps

Meta Viewport

Websites Using Meta Viewport

This site uses the viewport meta tag which means the content may be optimized for mobile content.

Content Management System

Drupal

Websites Using Drupal

Drupal is a free software package that allows you to easily organize, manage and publish your content, with an endless variety of customization

The Apache HTTP Server is an open-source HTTP server for modern operating systems including UNIX, Microsoft Windows, Mac OS/X and Netware. The goal of this project is to provide a secure, efficient and extensible server that provides HTTP services observing the current HTTP standards. Apache has been the most popular web server ...

Framework

PHP

Websites Using PHP

PHP is a widely-used general-purpose scripting language that is especially suited for Web development and can be embedded into HTML.

Payment & Currencies

Payment Currency

Euro

Websites Using Euro

Website using the € symbol on their website - meaning it may accept payment in Euros.

Document Standard

X-UA-Compatible

Websites Using X-UA-Compatible

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.

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 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 Image Entity

Websites Using OpenGraph Image Entity

Open graph image entity tag

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 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