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

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
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
98Health
Framework Composer

Laravel

The expressive, elegant PHP framework for building modern web applications

34,910
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
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
89Health
SDK PyPI

Firecrawl Python SDK

Official Python SDK for the Firecrawl API — scrape, crawl, and search the web as clean Markdown or structured data for AI agents

180,358
MIT
Used by 11
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
88Health
Library Composer

Symfony HttpClient

A low-overhead, high-performance PHP HTTP client with sync, async, and streaming support

2,029
MIT
Used by 10
79Health
Library Composer

Symfony Process

Execute and manage sub-processes from PHP with a safe, cross-platform, streaming API

7,456
MIT
Used by 9
85Health
Library Composer

Symfony VarDumper

A better dump() function for PHP that walks and renders any variable clearly.

7,428
MIT
Used by 9
89Health
Library Composer

PHPMailer

The classic full-featured email creation and sending library for PHP

22,299
LGPL-2.1
Used by 8
97Health
Library Composer

PhpSpreadsheet

Read, write, and manipulate Excel, CSV, and ODS spreadsheet files in pure PHP with no external office suite required.

13,989
MIT
Used by 8
54Health
Library npm

micro

Tiny, async/await-first library for building HTTP microservices in Node.js

10,629
MIT
Used by 8
88Health
Framework Composer

Symfony Console

The PHP framework component for building beautiful, testable command-line applications

9,812
MIT
Used by 8
81Health
SDK Composer

Sentry for Laravel

Official Sentry SDK for Laravel with automatic error, log, and performance tracing capture

1,350
MIT
Used by 8
55Health
SDK npm

msgraph-sdk-javascript

Official Microsoft Graph JavaScript SDK for calling the Graph API from Node.js and the browser.

833
MIT
Used by 8
86Health
Library Composer

Monolog

The PSR-3 logging library that sends PHP logs to files, sockets, databases, and dozens of web services

21,405
MIT
Used by 7
94Health
Library Composer

Laravel Excel

Supercharged Excel and CSV exports and imports for Laravel applications

12,704
MIT
Used by 7
94Health
Library npm

gridstack.js

A dependency-free TypeScript library for building draggable, resizable, responsive dashboard grid layouts in the browser.

9,115
MIT
Used by 7

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