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

79Health
Tool npm

concurrently

Run multiple terminal commands in parallel, with color-coded output and cross-platform support.

7,848
MIT
Used by 103
93Health
Framework Cargo

Tokio

The async runtime powering most of Rust's networked, concurrent, and I/O-bound applications.

33,150
MIT
Used by 95
90Health
Tool PyPI

Gunicorn

A fast, lightweight pre-fork WSGI and ASGI HTTP server for running Python web apps in production on UNIX.

10,669
MIT
Used by 33
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
98Health
Framework npm

Bootstrap

The world's most popular front-end framework for building responsive, mobile-first sites

174,791
MIT
Used by 25
89Health
Tool npm

shadcn

Add beautifully designed, accessible UI components as owned source code via a CLI

123,770
MIT
Used by 24
85Health
Tool npm

dotenvx

A secure, cross-platform dotenv replacement that encrypts .env files and runs any command with decrypted secrets injected — no code changes required.

5,784
BSD 3
Used by 9
69Health
Tool npm

@vitejs/plugin-basic-ssl

A Vite plugin that generates a self-signed certificate so your dev and preview servers can run over HTTPS with zero setup.

516
MIT
Used by 8
88Health
Tool PyPI

Granian

A fast Rust HTTP server for Python that serves ASGI, WSGI, and RSGI applications

5,639
BSD 3
Used by 5
79Health
Tool Composer

Laravel Octane

Boots your Laravel application once and keeps it resident in memory on Swoole, RoadRunner, or FrankenPHP for dramatically faster request handling.

4,040
MIT
Used by 4
79Health
Tool PyPI

sphinx-design

Responsive web components for Sphinx documentation

231
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
95Health
Tool Go

cert-manager

Automates issuing, renewing, and managing TLS certificates for Kubernetes clusters.

14,079
Apache 2.0
Used by 3
92Health
Tool PyPI

Certbot

EFF's command-line tool to obtain and auto-renew free Let's Encrypt TLS certificates

33,232
Apache 2.0
Used by 2
94Health
Framework npm

React Admin

TypeScript framework for building admin panels and B2B apps on any API

26,935
MIT
Used by 2
85Health
Framework npm

workflow

Durable, resilient workflow execution for TypeScript, with automatic retries, persistence, and built-in observability.

2,399
Apache 2.0
Used by 2
93Health
Framework npm

Primer CSS

GitHub's official Sass design system framework, providing utility classes and component styles for building GitHub-style interfaces.

13,016
MIT
Used by 1
85Health
Framework Cargo

actix

A Rust actor framework for building concurrent, message-driven systems on top of Tokio.

9,242
Other
Used by 1
81Health
Framework npm

Raycast API

The official React and TypeScript API for building extensions and AI tools that run inside Raycast, plus the `ray` CLI for scaffolding, building, and publishing them.

7,743
MIT
Used by 1
91Health
Framework PyPI

Twisted

A mature, event-driven networking engine for Python built around the reactor pattern, with async HTTP, SSH, DNS, IMAP, and IRC protocols built in.

5,979
MIT
Used by 1
56Health
Framework Cargo

tarpc

An async Rust RPC framework that defines services directly in code via a macro instead of a separate IDL, with pluggable transports and deadline propagation.

3,739
MIT
Used by 1
62Health
Tool npm

AI Elements

A CLI and shadcn/ui-based component registry for building AI-native chat interfaces on top of the Vercel AI SDK.

2,434
Apache 2.0
Used by 1
75Health
Framework PyPI

taskiq

An async-first distributed task queue for Python with type-safe tasks, pluggable brokers, and first-class FastAPI/AioHTTP integration.

2,333
MIT
Used by 1
91Health
Framework npm

PatternFly

The official HTML, CSS, and Handlebars source for PatternFly, Red Hat's open-source design system for building consistent enterprise UIs.

817
MIT
Used by 1

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