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WordPress is an open source blog publishing and content management system, based on PHP and MySQL.

Drupal is an open source content management system written in PHP, originally developed by Dries Buytaert.

Adobe (formerly Macromedia) Dreamweaver is a web design tool running on OS X and Windows.

PHP is a scripting language for creating websites.

JavaScript is a lightweight, object-oriented, cross-platform scripting language.

Static websites don't use any server-side programming language for generating web pages, but deliver fixed content which is created manually or with an offline tool.

JavaScript is a lightweight, object-oriented, cross-platform scripting language, often used within web pages.

jQuery is a JavaScript library that simplifies HTML document traversing, event handling, animating and Ajax interaction. Originally developed by John Resig.

Bootstrap is an open source HTML, CSS, and JavaScript framework.

Modernizr is a JavaScript library that detects HTML5 and CSS3 features in the visitors browser.

React is an open source JavaScript library for building user interfaces, developed by Facebook.

Next.js is an open source JavaScript framework based on React and Node.js.

Bootstrap is an open source HTML, CSS, and JavaScript framework.

The Apache HTTP Server is an open source web server by the Apache Software Foundation.

Nginx (pronounced as "engine X") is a lightweight open source web server developed by Igor Sysoev.

Cloudflare Server is a web server developed by Cloudflare.

Node.js is a server-side JavaScript environment for writing network programs such as web servers, originally developed by Ryan Dahl.

Linux is a Unix-like open source operating system originally developed by Linus Torvalds.

Ubuntu is a Linux distribution.

Pantheon provides CMS hosting.

Amazon is a US-based e-commerce and cloud computing provider.

Acquia provides Drupal hosting.

OVH is an internet service provider providing dedicated servers, shared and cloud hosting, headquartered in France.

DigitalOcean is a US-based web hosting provider.

Amazon is a US-based e-commerce and cloud computing provider.

DigitalOcean is a US-based web hosting provider.

OVH is an internet service provider providing dedicated servers, shared and cloud hosting, headquartered in France.

Fastly is a content delivery network.

Akamai is a content delivery network. This includes the former brands Instart Logic and StackPath.

Cloudflare provides a content delivery network.

Amazon CloudFront is a content delivery web service by Amazon.

DNS Made Easy is a DNS service provider owned by DigiCert.

Amazon is a US-based e-commerce and cloud computing provider.

Proofpoint provides email protection and other IT security services.

Sectigo (formerly Comodo CA) is a US-based SSL certificate authority.

Starfield Technologies is an SSL certificate authority owned by Go Daddy.

Let’s Encrypt is a free, automated, and open certificate authority provided by the Internet Security Research Group.

DigiCert is an SSL certificate authority. This includes Verizon, whose Enterprise SSL Business has been acquired by DigiCert.

Google Hosted Libraries (formerly called Google Libraries API) is a content distribution network for the most popular, open-source JavaScript libraries, provided by Google.

The CDNJS is a content distribution network, hosting a large number of JavaScript libraries, provided by CloudFlare.

jsDelivr is a service for hosting JavaScript files.

unpkg is a JavaScript content delivery network for libraries that use the npm package manager.

Google Analytics is a free service to get detailed statistics about the visitors of a website, provided by Google. This includes the Ads conversion tracking and the Floodlight services.

Hotjar is a website analytics and feedback application.

New Relic is a web application performance management tool.

The LinkedIn Insight Tag helps to optimize LinkedIn campaigns.

Quantcast provides visitor statistics of web sites.

CrazyEgg is a website visitor and click tracking service.

Lucky Orange is a website visitor tracking platform.

Siteimprove is a web governance software, that includes a web analytics module.

The Google Advertising network consists of AdSense, DoubleClick and other services.

Equativ (formerly Smart AdServer) is an advertising networks for ads served on the web, mobile and tablets.

The Google Tag Manager is a Google service to support webmasters to manage tags on their websites.

Facebook Social Plugins provide a way for Facebook users to share web pages with their friends.

A Twitter/X Button allows a Twitter user to post a tweet from the visited site.

LinkedIn Share Buttons enable visitors to to share website content with their LinkedIn network.

AddToAny is a social bookmarking and sharing service.

External Cascading Style Sheets define style rules in a separate CSS file.

Embedded Cascading Style Sheets define a set of style rules in a <style> element within a web page.

Inline Cascading Style Sheets define style rules directly within an (X)HTML element using the style attribute.

Gzip (GNU zip) is a file compression algorithm.

Brotli is a lossless compression algorithm developed by Google.

A strong ETag is an HTTP header field for validation of cached web pages, that indicates a byte-for-byte identical page in the cache.

A weak ETag is an HTTP header field for validation of cached web pages, that indicates a semantically equivalent page in the cache.

The Internet Protocol version 6 (IPv6) provides amongst others a vastly larger address space than the preceding version 4. We consider a website to support IPv6 if a 128-bit address is assigned to it, regardless of the content delivered at that address.

HTTP/2 is the second major version of the HTTP network protocol.

HTTP/3 is the third major version of the HTTP network protocol, derived from the QUIC protocol.

HTTP Strict Transport Security (HSTS) defines a mechanism enabling web sites to declare themselves accessible only via secure connections.

Session cookies are temporary cookies, which are deleted when the user closes the browser.

Persistent cookies with an expiration time of up to 1 day.

Persistent cookies with an expiration time between 1 month and 1 year.

HttpOnly cookies are used only in the HTTP protocol and not in client side scripts, which may increase security.

Non-HttpOnly cookies are used in the HTTP protocol and also in client side scripts, which may be a security threat.

Secure cookies are used only via an encrypted connections, which may increase security.

The websites redirects visitors to its www subdomain, e.g. from example.com to www.example.com.

The websites redirects visitors to use SSL encryption, e.g. from http://example.com/ to https://example.com/.

The Open Graph protocol, originally developed by Facebook, is an RDFa-based format that enables any web page to become a rich object in a social graph.

Twitter/X Cards enable automatic attachment of photos, videos and media elements to tweets.

Generic RDFa (Resource Description Framework in attributes) is RDFa without further specialization.

JSON-LD (JavaScript Object Notation for Linked Data) is a method of encoding Linked Data using JSON.

Microdata is a specification to integrate metadata within existing content on web pages.

HTML5 is the fifth revision of the HTML standard.

UTF-8 (8-bit Unicode Transformation Format) is a variable-length character encoding for Unicode, which is backwards compatible with ASCII.

PNG (Portable Network Graphics) is a lossless compression image format, suitable to store graphics with uniformly colored areas, and originally introduced as a free, open-source successor of GIF.

JPEG (Joint Photographic Experts Group) is a lossy compression method suitable to store photographic images.

Scalable Vector Graphics (SVG) is an XML-based vector image format.

WebP is an image format that provides lossless and lossy compression, developed by Google.

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