Website pen.org

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Facebook Ads Advertisers.

Linkedin Advertisers, websites using Linkedin Conversion Tracking.

Twitter Advertisers

Facebook Retargeting Pixel

DoubleClick is a provider of digital marketing technology and services. Companies come to DoubleClick for expertise in ad serving, media, video, search and affiliate marketing to help them make the most of the digital medium.

New Relic offers SaaS Application Performance Management and Real User Monitoring for Cloud and Data Center deployed web applications implemented in Ruby, Java, .NET or PHP.

heatmap provides realtime analytics to help chief editors and marketeers understand in seconds which are their best performing contents and which are less attractive to users.

Denmark-based Mouseflow is an online tool for performing advanced web analytics and realtime user studies on websites. It is a hosted service that can be used on any publicly facing website. Mouseflow records whole visitor sessions including mouse movements, clicks, scroll events and key strokes. Website administrators can pl...

Google Tag Manager makes it easy for marketers to add and update website tags including analytics, remarketing, and more.

Podcast hosting services

Previously Google Apps for Business. G Suite is a cloud-based productivity suite that helps you and your team connect and get work done from anywhere on any device. It's simple to setup, use and manage, allowing you to work smarter and focus on what really matters.

Track Your Results. Get the stats on your campaigns and subscribers, so you can improve your content every time you send, and tailor your newsletters to your ...

Varnish is an HTTP accelerator designed for content-heavy dynamic web sites. In contrast to other web accelerators, such as Squid, which began life as a client-side cache, or Apache and nginx, which are primarily origin servers, Varnish was designed as an HTTP accelerator. Varnish is focused exclusively on HTTP, unlike other pro...

Pantheon hosts Drupal and Wordpress sites, while also delivering staging environments, backups, workflow, a global CDN and HTTPS.

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

A family of standard web feed formats used to publish frequently updated information like blog entries, news headlines, audio and video.

Websites that accept payment with JCB

Stripe is a developer-friendly way to accept payments online and in mobile apps.

Open graph locale entity tag

Open graph type entity tag

Open graph description entity tag

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

Open graph site name entity tag

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

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.

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.

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

Sites using Html 5 SVG 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.