Directory

Open Source Packages

Libraries, frameworks, tools, and SDKs used by the apps in this directory — scored the same way as the apps themselves.

5929 packages

All Packages

95Health
Framework npm

React Router

A multi-strategy router for React, from a lightweight library to a full SSR framework.

56,573
MIT
Used by 165
86Health
Framework npm

Express

The fast, unopinionated, minimalist web framework for Node.js

69,454
MIT
Used by 158
96Health
Framework npm

Next.js

The React framework for production: file-based routing, server rendering, and Rust-powered builds.

142,310
MIT
Used by 154
97Health
Framework npm

Electron

Build cross-platform desktop apps with JavaScript, HTML, and CSS on Chromium and Node.js

123,052
MIT
Used by 68
90Health
Framework npm

Hono

A small, ultrafast web framework built on Web Standards that runs identically everywhere.

32,186
MIT
Used by 60
94Health
Framework npm

TanStack Router

A fully type-safe React router with built-in data loading, caching, and URL search-param validation.

15,081
MIT
Used by 56
93Health
Framework npm

Docusaurus

React-based static site generator for building fast, maintainable documentation websites.

66,246
MIT
Used by 36
90Health
Framework npm

tRPC Server

Build end-to-end typesafe APIs in TypeScript with no schemas, no code generation, and zero runtime bloat.

40,607
MIT
Used by 35
97Health
Framework npm

React Native

Build native iOS and Android apps from a single React codebase using the components and patterns you already know.

126,600
MIT
Used by 31
93Health
Framework npm

NestJS

A progressive Node.js framework for building efficient, scalable, and maintainable server-side applications in TypeScript.

76,663
MIT
Used by 27
83Health
Framework npm

Expo

Open-source framework for building universal native apps with React that run on Android, iOS, and the web.

52,237
MIT
Used by 27
92Health
Framework npm

Lexical

An extensible, framework-agnostic text editor framework for building reliable, accessible rich-text experiences on the web.

23,852
MIT
Used by 27
93Health
Framework npm

preact

Fast, 3kB React-compatible Virtual DOM library with the same modern component API.

38,868
MIT
Used by 19
89Health
Framework npm

Slate

Completely customizable framework for building rich text editors

31,748
MIT
Used by 16
90Health
Framework Cargo

napi-rs

Build precompiled Node.js add-ons in Rust via Node-API, no node-gyp required

7,939
MIT
Used by 13
88Health
Framework npm

Mastra Core

The TypeScript framework for building AI agents, workflows, and RAG apps with unified access to 40+ LLM providers.

28,036
Apache 2.0
Used by 8
65Health
Framework npm

Nextra

Next.js-powered static site generator for docs, blogs, and content sites

13,921
MIT
Used by 8
78Health
Framework npm

grammY

The modern TypeScript framework for building Telegram bots on Node.js and Deno

3,743
MIT
Used by 6
92Health
Framework npm

Remotion

A React framework for creating videos programmatically with code, real browser rendering, and server-side or cloud-scale export.

59,226
Other
Used by 5
92Health
Framework npm

Plate

A React rich-text editor framework built on Slate, with a plugin system, AI features, and shadcn/ui components.

16,580
MIT
Used by 5
92Health
Framework Go

Fiber

An Express-inspired Go web framework built on Fasthttp for zero-allocation, extreme-performance HTTP servers.

40,158
MIT
Used by 4
80Health
Framework npm

graphql-yoga

A fully-featured, spec-compliant GraphQL server built on the WHATWG Fetch API, running anywhere from Node to Cloudflare Workers.

8,531
MIT
Used by 4
52Health
Framework npm

botbuilder-js

The Node.js/TypeScript SDK for Microsoft Bot Framework — adapters, middleware, and channel integrations for building conversational bots.

724
MIT
Used by 4
92Health
Framework npm

CopilotKit

React hooks and providers for building AI copilots with shared state, generative UI, and human-in-the-loop workflows.

37,348
MIT
Used by 3

Join founders buildingwith open source

Opinionated takes, migration guides, cost-saving tips, and insights from the open source ecosystem.

Subscribe on Substack
Join 750+ subscribers