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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React Router
A multi-strategy router for React, from a lightweight library to a full SSR framework.
Next.js
The React framework for production: file-based routing, server rendering, and Rust-powered builds.
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.
TanStack Router
A fully type-safe React router with built-in data loading, caching, and URL search-param validation.
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.
Docusaurus
React-based static site generator for building fast, maintainable documentation websites.
tRPC Server
Build end-to-end typesafe APIs in TypeScript with no schemas, no code generation, and zero runtime bloat.
React Native
Build native iOS and Android apps from a single React codebase using the components and patterns you already know.
Expo
Open-source framework for building universal native apps with React that run on Android, iOS, and the web.
Lexical
An extensible, framework-agnostic text editor framework for building reliable, accessible rich-text experiences on the web.
Typer
Typer is a Python library for building CLI applications, using type hints to generate arguments, options, validation, help text, and shell completion automatically.
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
Flask
A lightweight WSGI web framework for Python that scales from a single file to complex applications.
preact
Fast, 3kB React-compatible Virtual DOM library with the same modern component API.
LangGraph
A low-level orchestration framework for building stateful, multi-actor LLM agents as graphs
Slate
Completely customizable framework for building rich text editors
Django
The high-level Python web framework that turns database models into secure, working web applications in record time.
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
Echo
A minimalist, high-performance Go web framework with a radix-tree router, built-in middleware chain, and first-class HTTP/2 support.
OpenAI Agents SDK
OpenAI's provider-agnostic Python framework for building multi-agent LLM workflows with tools, guardrails, and tracing.
