Indexed Database API
CSS WG test repository (mirrored at https://hg.csswg.org/test/)
Test Suites for Web Platform specifications—including WHATWG, W3C and others
Navigation Timing draft specs from webperf
Web Authentication WG: https://www.w3.org/Webauthn Editors' Draft:
Tools for Web Platform Tests
W3C WebDriver compatible client.
The WebDriver API and wire protocol
WAI-ARIA Authoring Practices, maintained by ARIA WG https://www.w3.org/WAI/ARIA/
WCAG 2.1 and support materials
A place to find and contribute examples of typographic features in text, especially from non-Latin scripts.
Performance timeline spec from webperf
The Micropub spec
Presentation API specification
Mirror of CSS WG Editor Draft repository - https://hg.csswg.org/drafts
WebRTC 1.0 API
Repository for the Spatial Data on the Web Working Group
Web Content Accessibility Guidelines
The Service Worker Specification https://w3c.github.io/ServiceWorker/
Script to sync w3c-test.org with github repository and pull requests
Web of Things Working Group
Specberus is a checker used at W3C to validate the compliance of Technical Reports with publication rules.
A tool for creating technical documents and web standards