Open Source Packages
Libraries, frameworks, tools, and SDKs used by the apps in this directory — scored the same way as the apps themselves.
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soupsieve
The pure-Python CSS4 selector engine that powers Beautiful Soup's select() and select_one() methods.
aiosignal
A lightweight async callback registry that turns a mutable list of coroutine receivers into a frozen, awaitable dispatch signal.
Streamlit
Turn a Python script into a shareable data app in minutes, with no frontend code
Pulumi
Infrastructure as Code in your favorite programming language, powered by a shared multi-language deployment engine.
Seaborn
A Python statistical data visualization library built on matplotlib, for attractive charts with minimal code
youtube-transcript-api
Fetch transcripts and auto-generated subtitles for any YouTube video in Python
certmagic
Automatic HTTPS for Go programs — the production-grade ACME client library that powers Caddy, obtaining and renewing TLS certificates with zero manual cert management.
OAuthLib
Generic, spec-compliant OAuth1, OAuth2, and OpenID Connect implementation for Python
watchfiles
Simple, modern, and fast file watching and code-reload for Python, powered by a Rust core built on the `notify` crate
Blinker
Fast Python in-process signal/event dispatching for decoupled object-to-object notifications
slowapi
Rate limiting for Starlette and FastAPI endpoints, adapted from Flask-Limiter.
tldextract
Accurately splits any URL or hostname into subdomain, domain, and public suffix using the Public Suffix List.
pyOpenSSL
A Python wrapper around the OpenSSL library for TLS connections and certificate handling
build
A simple, correct Python build frontend for producing PEP 517 source distributions and wheels.
python-semver
Parse, compare, and bump semantic version strings in Python
weaviate-python-client
The official Python SDK for Weaviate, with typed sync and async clients for vector search, RAG, and collection management.
Gradio
Build and share machine learning web apps and demos in pure Python.
Deep Agents
The batteries-included agent harness for building long-horizon LLM agents
Tornado
Python web framework and asynchronous networking library built for high concurrency
Pydantic AI
A type-safe Python agent framework built by the Pydantic team
IPython
A productive interactive Python shell with rich introspection, tab completion, and magic commands.
SymPy
Full-featured computer algebra system (CAS) written entirely in pure Python
RQ
Simple Python library for queueing jobs and processing them in the background with Redis or Valkey workers
hypothesis
Property-based testing for Python that generates edge cases and shrinks failures to their simplest reproducing example.
