Workflow DevKit: Build durable, reliable, and observable apps and AI Agents in Typescript

A command-line benchmarking tool

Robust http-like coms over iframes and windows using postMessage

A simple, fast streaming JSON parser built on standards.

A type-safe marriage of `EventTarget` and `EventEmitter`.

The most comprehensive authentication framework for TypeScript

Catch unnecessary React useEffect hooks to make your code simpler, faster, and safer.

Ergonomic Framework for Humans

🧠 Cognitive load is what matters

Massimo is an API SDK client and CLI tool for creating clients for remote OpenAPI or GraphQL APIs

Rethinking of CPU profile analysis

Become a Vitest superuser 🦹‍♀️

The fastest knowledge base for growing teams. Beautiful, realtime collaborative, feature packed, and markdown compatible.

🏃‍♂️🏃‍♀️🏃 JS minification benchmarks: babel-minify, esbuild, terser, uglify-js, swc, google closure compiler, tdewolff/minify, oxc-minify

Bidirectional Channels for JavaScript

A proposal to bring ergonomic, inline error handling to JavaScript through a new try operator that always returns a Result.

Unstyled UI components for building accessible web apps and design systems. From the creators of Radix, Floating UI, and Material UI.

Build production-ready applications in TypeScript

Type-Safe Errors for JS & TypeScript

ESM and TypeScript rewrite of Google's diff-match-patch for JavaScript

ActivityPub server framework in TypeScript

Manage stacked Git branches

A reverse engineering of Linear's sync engine. Endorsed by its co-founder & CTO.

The WIP version of Vite powered by Rolldown

Local package testing made easy

WarpDrive is the lightweight data library for ambitious web apps — universal, typed, reactive, and ready to scale.