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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pytest
The Python testing framework that makes writing small tests easy and scales to complex functional test suites.
FastAPI
A modern, high-performance Python web framework for building APIs with automatic validation, serialization, and interactive docs.
aiohttp
Asynchronous HTTP client and server framework for Python's asyncio, covering both API calls and building web/WebSocket services.
Transformers
State-of-the-art pretrained models for text, vision, audio, and multimodal inference and training.
Flask
A lightweight WSGI web framework for Python that scales from a single file to complex applications.
Typer
Typer is a Python library for building CLI applications, using type hints to generate arguments, options, validation, help text, and shell completion automatically.
Django
The high-level Python web framework that turns database models into secure, working web applications in record time.
LangChain
The most widely adopted Python framework for building LLM-powered agents and applications
Starlette
A lightweight ASGI framework/toolkit for building async web services and apps in Python
LangGraph
A low-level orchestration framework for building stateful, multi-actor LLM agents as graphs
django-rest-framework
The most widely-used toolkit for building Web APIs on top of Django, with serializers, viewsets, and a built-in browsable API.
FastMCP
The fast, Pythonic framework for building Model Context Protocol servers, clients, and apps
Pydantic AI
A type-safe Python agent framework built by the Pydantic team
OpenAI Agents SDK
OpenAI's provider-agnostic Python framework for building multi-agent LLM workflows with tools, guardrails, and tracing.
Streamlit
Turn a Python script into a shareable data app in minutes, with no frontend code
Gradio
Build and share machine learning web apps and demos in pure Python.
Pulumi
Infrastructure as Code in your favorite programming language, powered by a shared multi-language deployment engine.
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
PySpark
Python API for Apache Spark, the unified engine for large-scale distributed data processing
Strands Agents
A model-driven Python SDK for building and running AI agents in just a few lines of code
Apache Airflow
Programmatically author, schedule, and monitor data workflows as Python-defined DAGs.
Textual
The Python framework for building sophisticated terminal and web user interfaces with a simple, async-native API.
PyTorch Lightning
A deep learning framework that organizes PyTorch training code and automates multi-GPU, mixed-precision, and distributed training.
