A backward-compatible CSS language extension inspired by Sass that supports variables, mixins, operations, and functions.

Text

The plain text document format.

A proposed open standard for using rel-me links to profiles on OAuth supporting services to authenticate via either those profiles or your own site.

Webmention

A simple protocol to notify any URL when a website links to it, and for web pages to request notifications when somebody links to them.

XML

A markup language and file format for storing, transmitting, and reconstructing arbitrary data.

RDF

A W3C standard model to describe and exchange graph data on the web.

WCAG

The Web Content Accessibility Guidelines are a set of recommendations for making web content more accessible, developed by W3C.

Rack

A minimal, modular interface and invocation convention that operates between Ruby web servers and web applications to standardize how HTTP requests and responses are exchanged.

Prerender

The rel="prerender" attribute on HTML elements.

Humans.txt

A text file that can be created by developers to list the people who have contributed to a website.

Markdown

A markup language used to add formatting to plain text documents.

JSON Web Token

An open standard (RFC 7519) that defines a compact and self-contained way for securely transmitting information between parties as a JSON object.

XRDS

An XML-based file format that provides a list of service endpoints (e.g., OpenID) available on a website.

WebAssembly

A portable binary code format that can be run in modern web browsers with near-native performance.

IDN

Internationalized Domain Names allow people around the world to use domain names in local languages, such as Arabic, Chinese, or Cyrillic.