Skills, MCP servers, and tools for producing video with Claude Code. Covers programmatic video (Remotion, Manim), screen recording, YouTube clipping, and FFmpeg post-processing.

A collection of DESIGN.md files analysis by popular brand design systems. Drop one into your project and let coding agents generate a matching UI.

Calendar sync tool & universal calendar MCP server. Aggregate, sync and control calendars on Google, Outlook, Office 365, iCloud, CalDAV or ICS.

Privacy-first CLI: reads Claude Code JSONL, Codex sessions, and Cursor DBs on disk; applies YAML rates; prints estimated USD (tables/JSON). Not an invoice.

Upgraded URL API

Extended fetch API and the LiveResponse API

Advanced Web Messaging Primitives – MessageChannel, BroadcastChannel, MessagePort, MessageEvent, WebSocket

Lightweight key/value storage abstraction for modern apps — Redis, IndexedDB, Memory, File

Disposable webmail server (similar to Mailinator) with built in SMTP, POP3, RESTful servers; no DB required.

Universal database contract for applications and agents.

🏋️ Find out the cost of adding a new frontend dependency to your project

Monorepo containing the State of JS apps

Write low-level WebAssembly, from JavaScript

Web Applications Working Group

HTML for the Modern UI

W3C specs and API reviews

CSS Toggles demo and polyfill

An ecosystem of technologies that explore new ways to go web-native on the modern application story!

A web-native framework that lets you build absurdlly fast

Node.js sample project for trying out Dev Containers

Low-level realtime DOM APIs

node.js command-line interfaces made easy

A small Command Line utility that automates certain aspects of hand-authored OOHTML-based documents.

Manifest for web apps

Home for explainer documents originated by the Microsoft Edge team

Maintain an open standard for UI and promote its adherence and adoption.

DOM Standard

A runtime extension to JavaScript that unlocks Imperative Reactive Programming (IRP) in JavaScript!