Website en.wikipedia.org

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

Website using the £ symbol on their website - meaning it may accept payment in this British currency.

websites using the $ symbol on their website - meaning it may accept payment in this currency used in Israel.

iDEAL is a payment method made up of a collection of agreements and standards for an immediate online transfer from a purchaser’s bank account to the bank account of a webshop or organisation.

Website that accept bitcoin as payment method

Really Simple Discovery is a way to help client software find the services needed to read, edit, or "work with" weblogging software.

Open graph type 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

Sites using Html 5 Audio 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.

Indicates that the site provides an interface specifically for searching the document and its related resources.

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

Wesites using favicon rel 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.