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

75Health
Library PyPI

feedparser

Parses RSS, Atom, RDF, CDF, and JSON feeds into one normalized Python dictionary.

2,421
Other
Used by 9
93Health
SDK PyPI

pymilvus

The official Python SDK for Milvus, the open-source vector database for embedding-based similarity search.

1,408
Apache 2.0
Used by 9
89Health
Framework PyPI

OpenAI Agents SDK

OpenAI's provider-agnostic Python framework for building multi-agent LLM workflows with tools, guardrails, and tracing.

29,431
MIT
Used by 8
87Health
Tool PyPI

isort

Automatically sorts and organizes Python import statements

6,951
MIT
Used by 8
94Health
Library PyPI

Werkzeug

The comprehensive WSGI utility library that powers Flask and countless Python web apps.

6,881
BSD 3
Used by 8
84Health
Library PyPI

gevent

Coroutine-based concurrency for Python, built on greenlets and a fast libev/libuv event loop.

6,448
MIT
Used by 8
84Health
Library PyPI

json_repair

Repair malformed JSON from LLMs, APIs, logs, and user input — a drop-in fallback for json.loads().

5,096
MIT
Used by 8
79Health
Library PyPI

python-socketio

Python implementation of the Socket.IO realtime protocol for both servers and clients.

4,369
MIT
Used by 8
77Health
Library PyPI

Markdown

The reference Python implementation of John Gruber's Markdown, with a pluggable extension system for converting text to HTML.

4,246
BSD 3
Used by 8
89Health
Library PyPI

msgspec

A fast, zero-cost serialization and validation library for JSON, MessagePack, YAML, and TOML in Python.

4,105
BSD 3
Used by 8
58Health
Tool PyPI

flake8

The CLI linter that wraps PyFlakes, pycodestyle, and McCabe complexity checks into a single Python style and error checker.

3,823
MIT
Used by 8
49Health
Library PyPI

html2text

Converts HTML into clean, readable Markdown-formatted plain text, as both a Python library and a CLI tool.

2,170
GPL 3.0
Used by 8
88Health
Library PyPI

PyMdown Extensions

A rich extension pack for Python-Markdown adding tabs, superfences, emoji, and more

1,130
MIT
Used by 8
36Health
SDK PyPI

aioboto3

An async wrapper around boto3's high-level AWS resources, backed by aiobotocore

1,004
Apache 2.0
Used by 8
90Health
Library Cargo

jsonschema

A high-performance JSON Schema validator for Rust with Python, Ruby, and WASM bindings

814
MIT
Used by 8
70Health
Library PyPI

argon2-cffi

Secure, high-level password hashing for Python using Argon2

731
MIT
Used by 8
57Health
Library Cargo

tree-sitter-python

A fast, incremental Python grammar for the tree-sitter parsing library

566
MIT
Used by 8
95Health
Library PyPI

Faker

A Python library that generates realistic fake data for testing, seeding, and anonymizing datasets across 70+ locales.

19,402
MIT
Used by 7
78Health
Tool PyPI

Sphinx

A documentation generator that turns reStructuredText or Markdown sources into polished HTML, PDF, EPUB, and more.

8,014
Other
Used by 7
83Health
SDK PyPI

PyGithub

A typed Python library for the GitHub REST API, wrapping repositories, issues, pull requests, and organizations as lazy-loading objects.

7,772
Other
Used by 7
84Health
Library PyPI

opencv-python

Pre-built, pip-installable OpenCV bindings that give Python programs full computer vision and image-processing capabilities without compiling from source.

5,388
MIT
Used by 7
68Health
Library PyPI

ddgs

A Python metasearch library that aggregates text, image, news, and video search results

2,968
MIT
Used by 7
55Health
Library PyPI

django-storages

Pluggable cloud and remote storage backends for Django's file storage API

2,958
BSD 3
Used by 7
73Health
SDK PyPI

Tavily Python

Official Python SDK for Tavily's search, extract, crawl, and research API

1,396
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