100 Best Open-Source Tool Integration & Infrastructure in 2026 (Ranked by GitHub Activity)

25 MB cross-platform client for 100+ databases with a built-in AI assistant and MCP Server

Open-source Python SDK and AI gateway for calling 100+ LLMs through a unified OpenAI-compatible interface

Fair-code workflow automation platform with native AI capabilities. Combine visual building with custom code, self-host or cloud, 400+ integrations.

A language and system for AI agents to clone or create videos with footage, captions, B-roll, and effects

Open-source RAG engine combining knowledge retrieval and agent capabilities for LLMs

From the team behind Gatsby, Mastra is a framework for building AI-powered applications and agents with a modern TypeScript stack.

Open-source platform for building, scheduling, and managing collaborative AI agent teams

MCP server indexing codebases into a persistent knowledge graph with tree-sitter and hybrid LSP

an open source, extensible AI agent that goes beyond code suggestions - install, execute, edit, and test with any LLM

Open-source ChatGPT-like interface for multiple AI models, agents, and sandboxed code execution

User-friendly AI Interface (Supports Ollama, OpenAI API, ...)

Open-source 3D architectural editor with a local CLI, MCP tools, and practical workflows for humans and AI agents.

Production-ready platform for agentic workflow development.

Fastest enterprise AI gateway (50x faster than LiteLLM) with adaptive load balancer, cluster mode, guardrails, 1000+ models support & <100 µs overhead at 5k RPS.

Cross-platform desktop app for switching AI agent providers and managing MCP, Skills, and Prompts

Compresses tool outputs, logs, RAG chunks, files, and conversation history before they reach LLMs

Open-source CLI and library for evaluating and red-teaming prompts, agents, RAG systems, and LLM apps

Open source alternative to Semrush and Ahrefs

AutoGPT is the vision of accessible AI for everyone, to use and to build on. Our mission is to provide the tools, so that you can focus on what matters.

Local AI router for coding agents with provider fallback and 20–40% token-saving output compression

Build and run agents you can see, understand and trust.

MCP server that sandboxes tool output, persists session memory, and enforces routing across platforms

🔥 The Web Data API for AI - Turn entire websites into LLM-ready markdown or structured data

Composio powers 1000+ toolkits, tool search, context management, authentication, and a sandboxed workbench to help you build AI agents that turn intent into action.

Automate browser based workflows with AI

Visual testing tool for MCP servers

The all-in-one AI productivity accelerator. On device and privacy first with no annoying setup or configuration.

An open-source AI agent that brings the power of Gemini directly into your terminal.

Give your agent CAD superpowers.

A powerful MCP toolkit for coding, providing semantic retrieval and editing capabilities - the IDE for your agent

Packs an entire code repository into a single AI-friendly file for LLMs and other AI tools

Open-source Java library with unified APIs for integrating LLMs and vector databases into applications

YC (S26) | Open Computer History | Record your screen continuously locally and provide context to your agents (Claude, Codex, Openclaw, Hermes, Runner...)

The fullstack MCP framework to develop MCP Apps for ChatGPT / Claude & MCP Servers for AI Agents.

Official, Anthropic-managed directory of high quality Claude Code Plugins.

Rust document intelligence engine for extracting text, tables, metadata, images, and structured data

The official Python library for the OpenAI API

Connects AI assistants to the Unity Editor to manage assets, scenes, C# scripts, tests, and workflows

Context7 Platform -- Up-to-date code documentation for LLMs and AI code editors

An autonomous agent that conducts deep research on any data using any LLM providers

Local code knowledge graph serving compact review context to AI coding tools over MCP

Playwright MCP server

Give your AI agent eyes to see the entire internet. Read & search Twitter, Reddit, YouTube, GitHub, Bilibili, XiaoHongShu — one CLI, zero API fees.

AI Agent Engineering Platform built on an Open Source TypeScript AI Agent Framework

GitHub's official MCP Server

ToolHive is an enterprise-grade platform for running and managing Model Context Protocol (MCP) servers.

Private AI platform for agents, assistants and enterprise search. Built-in Agent Builder, Deep research, Document analysis, Multi-model support, and API connectivity for agents.

One command brings a complete pre-wired LLM stack with hundreds of services to explore.

Open-source AI knowledge base and MCP/A2A management platform with admin UI, user management, and SSO

MCP Toolbox for Databases is an open source MCP server for databases.

🚀 The fast, Pythonic way to build MCP servers and clients.

Streaming music player that finds free music for you

Agent skill that converts natural language and technical sources into editable, tested draw.io diagrams

Self-contained A-share market data toolkit for AI coding assistants, integrating 34 sources across 15 layers

Self-hosted Douyin and TikTok scraper and watermark-free downloader with REST API, MCP, CLI, and web console

Open-source, self-hosted IAM and authentication server with a web console, OAuth, OIDC, SAML, LDAP, and MCP

Open source MCP Servers for AWS

MCP for xiaohongshu.com

Community plugin to control Blender 3D with any LLM of your choice

Agent2Agent (A2A) is an open protocol enabling communication and interoperability between opaque agentic applications.

A MCP for Claude Desktop / Claude Code / Windsurf / Cursor to build n8n workflows for you

A Go implementation of the Model Context Protocol (MCP), enabling seamless integration between LLM applications and external data sources and tools.

Connect your users to their apps

Python scraper based on AI

🗂 The essential checklist for modern web development, for humans and AI agents

Multi-harness agentic plugin marketplace for Claude Code, Codex, Cursor, OpenCode, GitHub Copilot, Google Antigravity, and Pi

Sample code and notebooks for Generative AI on Google Cloud, with Gemini on Vertex AI

Chat app for Android that supports answers from multiple LLMs at once. Bring your own API key AI client. Supports OpenAI, Anthropic, Google, and Ollama. Designed with Material3 & Compose.

Harness LLMs with Multi-Agent Programming

🔥 Open Source Browser API for AI Agents & Apps. Steel Browser is a batteries-included browser sandbox that lets you automate the web without worrying about infrastructure.

🦍 The API and AI Gateway

小红书（XiaoHongShu、RedNote）链接提取/作品采集工具

Open-source LLM router and cost optimizer with an OpenAI-compatible proxy

The original local LLM interface. Text, vision, tool-calling, training, and more. 100% offline.

OpenAPI specification for the OpenAI API

AI-powered reverse engineering assistant that bridges IDA Pro with language models through MCP.

OpenAI ChatGPT, GPT-5, GPT-Image-1, Whisper API clients for Go

Browser extension and cross-platform desktop application for translation based on ChatGPT API.

Self-hostable trend and news aggregator with AI filtering, translation, analysis, and alerts

Open-source Gradio and React WebUI for multiple TTS engines, extensions, and Silly Tavern integration

The best way to create, deploy, and share MCP Servers

Open Source API and AI Gateway supporting REST, GraphQL, TCP, gRPC and MCP (Model Context Protocol)

The easiest way to serve AI apps and models - Build Model Inference APIs, Job queues, LLM apps, Multi-model pipelines, and more!

MCP server for AI agents to run 150+ cybersecurity tools for pentesting and vulnerability discovery

Semantic cache for LLMs. Fully integrated with LangChain and llama_index.

RobotGo, Go Native cross-platform RPA, GUI automation, Auto test and Computer use @vcaesar

AI agent microservice

Desktop multi-agent harness with visual workflows, built with Rust, Tauri, React, and langgraph-rust

MCP server to provide Figma layout information to AI coding agents like Cursor

A blazing fast AI Gateway with integrated guardrails. Route to 200+ LLMs, 50+ AI Guardrails with 1 fast & friendly API.

Command-line access to Google Workspace APIs with dynamic discovery, structured JSON, and 40+ agent skills

Agent Framework For Fintech and Banks

Open-source Python library for agentic RAG across public GitHub code, issues, and repository information

MCP generator for OpenAPIs 🫳🎤💥

An opinionated RAG framework for integrating GenAI into apps with multiple LLMs and file formats

Run any open-source LLMs, such as DeepSeek and Llama, as OpenAI compatible API endpoint in the cloud.

Get started with building Fullstack Agents using Gemini 2.5 and LangGraph

Gorilla: Training and Evaluating LLMs for Function Calls (Tool Calls)

SoTA production-ready AI retrieval system. Agentic Retrieval-Augmented Generation (RAG) with a RESTful API.

A security scanner for your LLM agentic workflows