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GitHub Pages is a web page creation and hosting service by GitHub.

Discourse is an open source discussion platform written in Ruby on Rails.

Medium is a hosted publishing platform.

Docutils is a Python-based open-source text processing system for generating documentation in HTML and other formats.

Sphinx is a Python-based tool for creating project documentation, based on Docutils.

Ruby is a general-purpose object-oriented language originally developed by Yukihiro "Matz" Matsumoto in Japan.

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.

Python is a general-purpose scripting language.

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

RequireJS is a JavaScript file and module loader.

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

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

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.

Envoy Proxy is a proxy server designed for large service-oriented architectures.

GitHub offers project repository hosting and also site hosting services.

Medium is a hosted publishing platform.

Discourse offers managed hosting of its open source discussion platform.

Read the Docs provides a platform for creating and hosting technical documentation.

GitHub offers project repository hosting and also site hosting services.

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

Fastly is a content delivery network.

Cloudflare provides a content delivery network.

Cloudflare provides DNS servers and other web services.

Gmail is the email service provided by Google.

Mailgun is an email service provider.

Discourse offers managed hosting of its open source discussion platform.

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

GlobalSign is an IT security service provider, also operating as SSL certificate authority.

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

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.

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.

Persistent cookies with an expiration time between 1 and 10 years.

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

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

Gzip (GNU zip) is a file compression algorithm.

Brotli is a lossless compression algorithm developed by Google.

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.

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.

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

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

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.

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.

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

GIF (Graphics Interchange Format) is a lossless compression image format, originally introduced by CompuServe and suitable to store graphics, logos and simple animations.

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