Open Source Packages
Libraries, frameworks, tools, and SDKs used by the apps in this directory — scored the same way as the apps themselves.
All Packages
Kind3
Category
Sort:Used by Most Apps
TypeScript
A strongly typed superset of JavaScript that compiles to clean, portable JavaScript.
ESLint
The pluggable JavaScript and TypeScript linter that finds and fixes code problems through a fully customizable, plugin-based rule engine.
Vite
Next-generation frontend build tool with an instant dev server, lightning-fast HMR, and optimized production builds.
prettier
An opinionated code formatter that enforces consistent style across every language your project speaks.
Vitest
A blazing-fast unit testing framework powered by Vite, with Jest-compatible APIs out of the box.
typescript-eslint
The official meta-package bundling the TypeScript ESLint parser, plugin, and rule presets behind a single typed config() helper.
Playwright
Cross-browser end-to-end web testing and browser automation with a single API for Chromium, Firefox, and WebKit.
@vitejs/plugin-react
The official Vite plugin for React with Babel-powered Fast Refresh and JSX transforms
tsx
A drop-in replacement for the node CLI that runs TypeScript and ESM files instantly, powered by esbuild.
eslint-config-prettier
Disables ESLint stylistic rules that conflict with Prettier, so the two tools never fight over formatting.
React Router
A multi-strategy router for React, from a lightweight library to a full SSR framework.
Express
The fast, unopinionated, minimalist web framework for Node.js
Next.js
The React framework for production: file-based routing, server rendering, and Rust-powered builds.
jest
Delightful JavaScript testing with zero-config setup, snapshots, mocking, and coverage
esbuild
An extremely fast JavaScript and CSS bundler and minifier written in Go.
posthog-js
The official browser SDK for PostHog — autocapture, session replay, feature flags, and surveys in one drop-in script.
AWS SDK for JavaScript (S3 Client)
The official modular AWS SDK v3 client for Amazon S3, with TypeScript-first APIs and streaming support.
ts-node
TypeScript execution engine and REPL for Node.js that runs .ts files directly, without a separate compile step.
eslint-plugin-react
React-specific linting rules for ESLint that catch JSX bugs, enforce Hooks conventions, and keep prop usage consistent.
lint-staged
Run linters and formatters only against the files staged in git, so a slow full-project lint never blocks a commit.
MCP TypeScript SDK
The official TypeScript SDK for building Model Context Protocol servers and clients.
cross-env
Cross-platform CLI for setting environment variables in npm scripts without worrying about Windows vs POSIX syntax.
eslint-plugin-import
ESLint rules that validate ES module import/export syntax and catch broken paths before they hit your build.
Sentry JavaScript (@sentry/browser)
The official Sentry SDK for capturing errors, performance traces, and session replays in browser JavaScript apps.
