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.
Commander.js
The complete, battle-tested framework for building Node.js command-line interfaces.
FastAPI
A modern, high-performance Python web framework for building APIs with automatic validation, serialization, and interactive docs.
yargs
The modern, pirate-themed command-line argument parser and command framework for Node.js
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.
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
Chat SDK
A unified TypeScript SDK for building chat bots and AI agents across every major messaging platform
OpenAI Agents SDK
OpenAI's provider-agnostic Python framework for building multi-agent LLM workflows with tools, guardrails, and tracing.
oclif Core
The Node.js framework that powers Salesforce CLI and Heroku CLI, providing flag parsing, help generation, and a plugin system for building CLIs.
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
