w3c topic
validator
Nu Html Checker – Helps you catch problems in your HTML/CSS/SVG
ditto
Eclipse Ditto™: Digital Twin framework of Eclipse IoT - main repository
specref
An open-source, community-maintained database of Web standards & related references.
graphql-yoga
🧘 Rewrite of a fully-featured GraphQL Server with focus on easy setup, performance & great developer experience. The core of Yoga implements WHATWG Fetch API and can run/deploy on any JS environment...
gpuweb
Where the GPU for the Web work happens!
respec
A tool for creating technical documents and web standards
trusted-types
A browser API to prevent DOM-Based Cross Site Scripting in modern web applications.
CSS2-1
CSS 2.1中文版（A Chinese (Simplified) translation of the CSS 2.1 specification.）
EasierRDF
Making RDF easy enough for most developers