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

96Health
Framework PyPI

pytest

The Python testing framework that makes writing small tests easy and scales to complex functional test suites.

14,506
MIT
Used by 100
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
95Health
Framework PyPI

aiohttp

Asynchronous HTTP client and server framework for Python's asyncio, covering both API calls and building web/WebSocket services.

16,548
Apache 2.0
Used by 40
95Health
Framework PyPI

Transformers

State-of-the-art pretrained models for text, vision, audio, and multimodal inference and training.

165,971
Apache 2.0
Used by 37
93Health
Framework npm

Docusaurus

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

66,246
MIT
Used by 36
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
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
80Health
Framework Go

Bubble Tea

A Go framework based on The Elm Architecture for building terminal UIs, from simple prompts to full-window, high-performance TUI applications.

44,940
MIT
Used by 13
91Health
Framework Go

Echo

A minimalist, high-performance Go web framework with a radix-tree router, built-in middleware chain, and first-class HTTP/2 support.

32,705
MIT
Used by 13
85Health
Framework npm

Capacitor

Build native iOS, Android, and Progressive Web Apps from a single web codebase

16,662
MIT
Used by 7
87Health
Framework PyPI

PySpark

Python API for Apache Spark, the unified engine for large-scale distributed data processing

43,997
Apache 2.0
Used by 4
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
60Health
Framework Composer

nwidart/laravel-modules

Split large Laravel applications into self-contained, independently generated modules — each with its own routes, controllers, views, and migrations.

6,211
MIT
Used by 4
73Health
Framework npm

@refinedev/core

Headless React meta-framework for building CRUD-heavy admin panels, dashboards, and internal tools fast.

35,676
MIT
Used by 3
96Health
Framework npm

aws-cdk

The core AWS CDK v2 construct library for defining cloud infrastructure as code and deploying it via CloudFormation.

12,901
Apache 2.0
Used by 3
77Health
Framework PyPI

behave

A Python behavior-driven development framework that runs Gherkin feature files against step definitions written in plain Python.

3,529
Other
Used by 3
70Health
Framework npm

nest-commander

nest-commander lets NestJS developers build command-line apps using the same decorators, DI, and modules as their web services.

485
MIT
Used by 3
94Health
Framework PyPI

Scrapy

A fast, high-level Python framework for crawling websites and extracting structured data at scale.

64,349
BSD 3
Used by 2
94Health
Framework PyPI

Apache Beam

A unified programming model for defining batch and streaming data-parallel pipelines

8,662
Apache 2.0
Used by 2
93Health
Framework Composer

Yii 2

Fast, secure, professional PHP framework with ActiveRecord ORM and code generation.

14,292
BSD 3
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
97Health
Framework Composer

CakePHP

The rapid-development MVC framework for PHP, with a powerful ORM and convention-over-configuration.

8,791
MIT
Used by 1
61Health
Framework npm

TypeGraphQL

Build type-safe GraphQL APIs in TypeScript by defining schema and resolvers with classes and decorators instead of hand-written SDL.

8,091
MIT
Used by 1
67Health
Framework Cargo

Extism

The framework for building with WebAssembly: load, run, and extend apps with wasm plugins.

5,758
BSD 3
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