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

40Health
Library npm

remark-gfm

Add GitHub Flavored Markdown support to remark for tables, task lists, footnotes, and strikethrough.

1,246
MIT
Used by 149
90Health
Framework PyPI

FastAPI

A modern, high-performance Python web framework for building APIs with automatic validation, serialization, and interactive docs.

102,333
MIT
Used by 76
62Health
Library PyPI

rich

A Python library for rendering rich text, tables, progress bars, and syntax-highlighted code in the terminal.

57,363
MIT
Used by 46
90Health
Tool PyPI

Ruff

An extremely fast Python linter and code formatter, written in Rust, built as a drop-in replacement for Flake8, Black, isort, and dozens of plugins.

49,630
MIT
Used by 46
90Health
Library npm

Prisma Client

Auto-generated, type-safe database client for Node.js and TypeScript.

47,610
Apache 2.0
Used by 46
91Health
Library npm

BullMQ

Fast, reliable Redis-based message queue and background job processing for Node.js and TypeScript.

9,396
MIT
Used by 41
82Health
SDK npm

Octokit REST

The official GitHub REST API client for JavaScript and TypeScript, with a typed method for every endpoint.

663
MIT
Used by 36
92Health
Framework Composer

PHPUnit

The de facto standard, programmer-oriented unit testing framework for PHP.

20,055
BSD 3
Used by 34
93Health
Library Composer

Guzzle

An extensible PHP HTTP client for sending requests and integrating with web services

23,455
MIT
Used by 31
90Health
Library PyPI

websockets

Build correct, fast WebSocket servers and clients in Python with asyncio, threading, or Sans-I/O APIs.

5,717
BSD 3
Used by 29
90Health
Framework PyPI

Typer

Typer is a Python library for building CLI applications, using type hints to generate arguments, options, validation, help text, and shell completion automatically.

19,983
MIT
Used by 26
96Health
SDK Go

go-github

A comprehensive Go client library for the GitHub REST API, covering everything from repos and issues to Actions, Apps, and enterprise admin endpoints.

11,307
BSD 3
Used by 23
98Health
Framework Composer

Laravel

The expressive, elegant PHP framework for building modern web applications

34,910
MIT
Used by 21
73Health
SDK npm

octokit.js

The all-batteries-included GitHub SDK for browsers, Node.js, and Deno.

7,845
MIT
Used by 21
55Health
Library Composer

Collision

Beautiful command-line error reporting for PHP apps and test suites

4,658
MIT
Used by 18
91Health
Library PyPI

Celery

Distributed task queue for running asynchronous jobs, scheduled work, and complex workflows across Python applications at scale.

28,883
BSD 3
Used by 16
80Health
SDK npm

@octokit/core

Extendable client for GitHub's REST and GraphQL APIs

1,285
MIT
Used by 15
58Health
SDK Composer

league/flysystem-aws-s3-v3

The official AWS S3 v3 SDK adapter for PHP Flysystem's unified filesystem API.

1,657
MIT
Used by 14
87Health
Library Composer

Symfony Yaml

PHP component for parsing and dumping YAML files, used throughout the Symfony framework

3,840
MIT
Used by 12
38Health
SDK npm

passport-github2

A Passport.js strategy for authenticating Node.js applications with GitHub via OAuth 2.0.

237
MIT
Used by 12
73Health
SDK npm

@octokit/auth-app

GitHub App authentication strategy for JavaScript and Octokit

180
MIT
Used by 12
42Health
Library npm

GSAP

The industry-standard JavaScript animation library for tweening CSS, SVG, canvas, and UI with rock-solid cross-browser reliability.

28,405
Other
Used by 11
95Health
Tool Composer

PHP CS Fixer

CLI tool that automatically fixes PHP code to follow coding standards

13,550
MIT
Used by 11
28Health
Library npm

micromark-extension-gfm

Bundles all six GitHub Flavored Markdown micromark extensions—tables, footnotes, strikethrough, autolinks, tag filtering, and task lists—into a single drop-in plugin.

40
MIT
Used by 11

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