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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Express
The fast, unopinionated, minimalist web framework for Node.js
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.
Electron
Build cross-platform desktop apps with JavaScript, HTML, and CSS on Chromium and Node.js
Hono
A small, ultrafast web framework built on Web Standards that runs identically everywhere.
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.
NestJS
A progressive Node.js framework for building efficient, scalable, and maintainable server-side applications in TypeScript.
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
napi-rs
Build precompiled Node.js add-ons in Rust via Node-API, no node-gyp required
OpenAI Agents SDK
OpenAI's provider-agnostic Python framework for building multi-agent LLM workflows with tools, guardrails, and tracing.
Mastra Core
The TypeScript framework for building AI agents, workflows, and RAG apps with unified access to 40+ LLM providers.
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.
