A DOOM engine implemented in CSS

Datatype is a variable font that turns text into charts.

EmDash is a full-stack TypeScript CMS based on Astro; the spiritual successor to WordPress

MapLibre GL JS - Interactive vector tile maps in the browser

🌀 OpenAPI to TypeScript codegen. Production-grade SDKs, Zod schemas, TanStack Query hooks, and 20+ plugins. Used by Vercel, OpenCode, and PayPal.

AI-safe .env files: Schemas for agents, Secrets for humans.

The open source coding agent.

Replace port numbers with stable, named local URLs. For humans and agents.

A feed-forward 3D foundation model for reconstructing scenes from streaming data

🪇 Minimal terminal spinners for Rust

Starlight plugin to validate internal links

High-performance Markdown and MDX processing for the JavaScript ecosystem

The free AI already on your Mac. CLI tool, OpenAI-compatible server, and interactive chat — all on-device via Apple Intelligence. No API keys, no cloud, no downloads.

An experiment in durability

Auto generated skeleton loading framework

Generate complex GitHub Actions YAML files using a declarative API.

Standalone tooling for validating CSS custom property registrations declared with `@property`

A sizes=auto polyfill

Arbitrary change history management in JavaScript.

Tiny engine for 3D voxel scenes rendered to SVG — boolean ops, oblique/perspective cameras, zero dependencies. Inspired by the geometric cardboard sculptures of Erwin Heerich.

Fast, accurate & comprehensive text measurement & layout

Fastest, plain JavaScript-based, HTML escaping library for JavaScript, works in both Node.js and browser. Even faster than a Rust-based one in real world HTMLs!

Performance evaluation of different approaches for bridging tsgo with JS

Code examples that accompany various MDN DOM and Web API documentation pages

a modern color picker for the web with support for all spaces

GitHub action that analyzes PR authors' recent activity patterns to detect automation signals.