Build your design system in React, Solid, Vue, Svelte or Vanilla. Powered by finite state machines

Property based testing framework for JavaScript (like QuickCheck) written in TypeScript

A javascript scrollbar plugin that hides the native scrollbars, provides custom styleable overlay scrollbars, and preserves the native functionality and feel.

A fast, efficient Node.js Worker Thread Pool implementation

A reactive data store & sync engine.

The cross-browser extension framework.

A tiny wrapper built around fetch with an intuitive syntax.

A framework for finding JavaScript memory leaks and analyzing heap snapshots

high performance, intuitive, and easy to use data structures for manipulating and processing structured data.

Parse, inspect, transform, and serialize content with syntax trees

A progressive web framework based on React and Rsbuild.

Open-source Next.js adapter for AWS

Read and write OpenType fonts using JavaScript.

Open-source PDF generation library built with TypeScript and React. Features a WYSIWYG template designer, PDF viewer, and powerful generation capabilities. Create custom PDFs effortlessly in both browser and Node.js environments.

The Open Source Next.js SaaS boilerplate for Enterprise SaaS app development

Library for building distributed, real-time collaborative web applications

A Node.js PostgreSQL client with runtime and build time type safety, and composable SQL.

Fully animated, open-source component distribution built with React, TypeScript, Tailwind CSS, Motion, and Shadcn CLI. Browse a list of components you can install, modify, and use in your projects.

Form builder library that allows developers to create dynamic forms, multi-step form wizards, and survey applications.

A build system for creating cross-platform styles.

Reactive state manager

Craft AI-driven interface effortlessly

gRPC for Node.js

Open-source, self-hosted P2P WebRTC video conferencing for fast, private real-time communication. Create browser-based meeting rooms with no downloads or time limits, plus screen sharing, chat, whiteboard, recording, and collaboration.

A React tiling window manager

The fast & forgiving HTML and XML parser

The form framework for coding agents

Realtime infrastructure for multiplayer apps and agents

Monaco Editor for React - use the monaco-editor in any React application without needing to use webpack (or rollup/parcel/etc) configuration files / plugins

A JavaScript implementation of a web browser without its graphical user interface