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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prettier
An opinionated code formatter that enforces consistent style across every language your project speaks.
pytest
The Python testing framework that makes writing small tests easy and scales to complex functional test suites.
Uvicorn
A lightning-fast ASGI server for Python, built on uvloop and httptools.
FastAPI
A modern, high-performance Python web framework for building APIs with automatic validation, serialization, and interactive docs.
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.
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.
Gunicorn
A fast, lightweight pre-fork WSGI and ASGI HTTP server for running Python web apps in production on UNIX.
mypy
Optional static type checker that catches Python bugs before you run your code
Flask
A lightweight WSGI web framework for Python that scales from a single file to complex applications.
Alembic
Database migrations tool for SQLAlchemy with autogenerate and transactional DDL
Typer
Typer is a Python library for building CLI applications, using type hints to generate arguments, options, validation, help text, and shell completion automatically.
Fastify
A fast and low-overhead web framework for Node.js, built around schema-based validation and a plugin architecture
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
urfave/cli
A declarative, dependency-free Go package for building fast, friendly command-line tools.
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
openapi-ts
OpenAPI-to-TypeScript code generator producing production-grade SDKs, Zod schemas, and TanStack Query hooks.
js-beautify
Reformats and re-indents JavaScript, HTML, and CSS into clean, readable code
MkDocs
A fast, simple static site generator for building project documentation from Markdown with a single YAML config file.
