w3c

gpuweb/gpuweb

+13

Where the GPU for the Web work happens!

wpt

+10

Test suites for Web platform specs — including WHATWG, W3C, and others

graphql-yoga

+3

🧘 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.

validator

+3

The Nu Html Checker (vnu)

csstree

+1

A tool set for CSS including fast detailed parser, walker, generator and lexer based on W3C specs and browser implementations