Tools

Header-only C++ implementation of HNSW for fast approximate nearest-neighbor search.

hnswlib is a header-only C++ library implementing the Hierarchical Navigable Small World (HNSW) graph algorithm for approximate nearest-neighbor search, with Python bindings and a tiny dependency footprint. Originally developed by the nmslib team, it has become the default HNSW implementation embedded inside many vector databases and search products. Engineers use it directly when they want HNSW retrieval without pulling in a heavyweight vector DB.

Open-source visual editor for React — your components, drag-and-drop, no vendor CMS

Puck is an open-source visual page builder for React that gives marketing teams a drag-and-drop editor backed by your own components — no vendor CMS, no proprietary runtime, just your components rendered in a visual canvas. With 12,500+ stars, MIT license, and a small but active team at Measured Co., Puck has become the default self-hosted answer for React-native visual editing.

Open-source async coding agent you can run in your own sandbox

Open-source framework from LangChain AI for building your organization's internal coding agent — the same pattern Stripe's Minions, Ramp's Inspect, and Coinbase's Cloudbot follow. Built on LangGraph and Deep Agents, Open SWE runs each task in an isolated cloud sandbox (Modal, Daytona, Runloop, or LangSmith), invokes from Slack, Linear, or GitHub, orchestrates subagents, and opens pull requests autonomously — customizable end-to-end for your codebase and conventions.

Build modular, scalable LLM applications in Rust

Open-source Rust library for building scalable, modular, and ergonomic LLM-powered applications. Rig unifies 20+ model providers (OpenAI, Anthropic, Mistral, DeepSeek, Ollama, and more) and 10+ vector stores behind one trait-based interface, supports completion and embedding workflows, multi-turn streaming, and transcription/audio/image generation, with full GenAI Semantic Convention compatibility and WASM-ready core library — production agentic infra for Rust teams.

See where your AI coding tokens actually go

Open-source TUI dashboard and CLI that shows where your AI coding tokens actually go, broken down by task type, tool, model, MCP server, and project. CodeBurn reads local session data directly from Claude Code, Codex, Cursor, OpenCode, Pi, and GitHub Copilot — no wrapper, proxy, or API keys — and layers on one-shot success rates so you can see whether the AI nails work first try or burns budget on edit/test/fix retries. Ships with a macOS menu bar widget and CSV/JSON export.

AI-powered file-type detection at Google scale

Open-source AI-powered file-type detection tool from Google that uses a custom deep-learning model under a few megabytes to identify more than 200 binary and textual content types in milliseconds, even on a single CPU. Magika ships as a CLI, Python package, JavaScript/TypeScript library, and an ONNX model, achieves around 99% accuracy on its test set, and is already used at Google scale across Gmail, Drive, and Safe Browsing as well as by VirusTotal and abuse.ch.

Fork, customize, and ship AI agents on Vercel in minutes

Open Agents is a Vercel Labs open-source template for building and deploying cloud-hosted AI agents. It provides a production-ready Next.js starter with built-in tool use, streaming responses, multi-model support, and deployment on Vercel infrastructure. Developers can fork, customize agent behavior and tools, then ship agent-backed apps in minutes with automatic scaling and edge routing.

Human-in-the-loop web agent you can co-pilot in real time

Magentic-UI is a Microsoft Research web agent with a human-in-the-loop interface for browsing, coding, and file tasks. It plans multi-step actions, asks for approval before executing, and lets users co-pilot by taking over the browser mid-task. Built on AutoGen, it runs a team of specialized agents for web browsing, file handling, and code execution with full action transparency and safety guardrails.

Constrained generation that guarantees valid LLM outputs every time

Guidance is Microsoft's structured generation library that enforces output constraints directly within LLM decoding. It supports JSON schemas, regex patterns, grammars, and interleaved generation-and-control flow to guarantee valid outputs from any compatible model. Works with local models via llama.cpp, Transformers, and remote APIs including OpenAI and Anthropic. Eliminates retry loops and post-processing for structured data extraction.

Vector search extension for SQLite that runs anywhere

sqlite-vec is a lightweight vector search extension for SQLite written in pure C with zero dependencies. It brings nearest-neighbor search capabilities directly into SQLite databases, enabling AI applications to store and query embeddings without running a separate vector database. The extension works everywhere SQLite runs including Linux, macOS, Windows, WebAssembly in browsers, and even Raspberry Pi devices. Sponsored by Mozilla Builders, Fly.io, and Turso.

AI-powered task management for agentic coding workflows

Claude Task Master is an AI-powered task management system designed for agentic development workflows in IDEs like Cursor, Windsurf, Lovable, and Roo. It breaks complex projects into structured task trees with dependencies, priorities, and complexity scores so AI coding agents can execute work methodically. The MCP server integration enables direct task operations from any compatible client, while tagged task lists support multi-context management across branches and environments.

Connect Blender to AI through Model Context Protocol

BlenderMCP bridges Blender and AI assistants like Claude through the Model Context Protocol, enabling natural language control over 3D modeling workflows. Artists and developers can create, modify, and manipulate 3D scenes, objects, materials, and animations by describing what they want instead of navigating complex menus. The tool exposes Blender's Python API through MCP, supporting operations from mesh creation to shader editing and physics simulations.

Agentic IM chatbot platform with multi-platform LLM integration

AstrBot is an open-source agentic chatbot infrastructure that connects multiple instant messaging platforms including Telegram, Discord, Slack, WeChat, QQ, Feishu, and DingTalk to AI language models. It supports multi-provider LLM integration, MCP protocol, knowledge bases, persona management, multimodal input, and a plugin ecosystem with over 1,000 community extensions. Features include a web management UI, sandbox code execution, and auto-context compression for efficient conversations.

LangChain-powered agent harness with planning and subagents

Deep Agents is a production-ready agent framework built on LangChain and LangGraph for complex agentic workflows. It features a planning system for task decomposition, a filesystem backend for persistent operations, sandboxed shell execution, and isolated subagents with independent context windows. Automatic context summarization keeps agents coherent across long sessions, while smart defaults simplify prompt engineering for multi-step autonomous tasks.

Multi-agent loop runner for autonomous PRD completion

ralphy is an autonomous bash-based orchestrator that runs Claude Code, Codex, OpenCode, Cursor agent, Qwen, and Droid in a continuous loop until a PRD is complete. Supports parallel task execution with isolated git worktrees, automated branching per task, PR creation, and webhook notifications to Discord and Slack. Cross-platform on macOS, Linux, and Windows via WSL2 or Git Bash.

OAuth 2.1 provider framework for Cloudflare Workers

workers-oauth-provider is Cloudflare's official OAuth provider library for Workers. It implements the provider side of the OAuth 2.1 protocol with PKCE support and RFC 8414 compliance. Handles token management automatically via Cloudflare KV storage. Gives fullstack teams a path to implement OAuth at the edge without heavy auth servers. TypeScript-native with npm package available.

Agent orchestration platform for Claude multi-agent swarms

ruflo is an agent orchestration platform built for Claude that enables deploying intelligent multi-agent swarms and coordinating autonomous workflows. Features enterprise-grade architecture with distributed swarm intelligence, self-learning capabilities, 100+ pre-built specialized agents, fault-tolerant consensus mechanisms, and RAG integration. Native Claude Code and Codex integration with MCP extension support.

Personal AI agent in your terminal with local tool access

gptme is one of the earliest terminal-based AI agent CLIs, launched in spring 2023. It equips a personal AI agent with local tools to run shell commands, write and edit code, browse the web via Playwright, and use vision capabilities. Supports MCP integration and an extensible plugin system for building persistent autonomous agents. The reference agent Bob has completed over 1700 sessions.

Parallel coding agent orchestrator with autonomous CI handling

Agent Orchestrator by Composio manages fleets of parallel AI coding agents, each working in isolated git worktrees. It autonomously handles CI failures, resolves code review comments, and manages pull requests with human intervention only for judgment calls. Agent-agnostic design supports Claude Code, Codex, and Aider with a unified web dashboard.

Programmable Markdown typesetting for docs, books, and slides

Quarkdown is a Turing-complete Markdown typesetting system that compiles a single source into print-ready books, academic papers, knowledge bases, or interactive presentations. It extends Markdown with a built-in scripting language featuring functions, variables, and a standard library for full document control. Supports HTML, PDF, and plain text output with live preview and real-time reloading during authoring.

OpenAI's autonomous coding agent orchestration framework

Symphony is OpenAI's open-source framework that turns project work into isolated, autonomous implementation runs. Instead of supervising coding agents line by line, teams assign tasks from project boards and Symphony dispatches agents to handle them independently. Each agent works in an isolated workspace, provides proof of work documentation including CI status and PR review feedback, and can automatically merge approved pull requests.

On-device hybrid search engine for your docs and notes

QMD is an on-device search engine built by Tobi Lütke (Shopify CEO) that indexes markdown notes, meeting transcripts, and documentation locally. It combines BM25 full-text search, vector semantic search, and LLM-powered re-ranking into a single hybrid pipeline. Ships with a built-in MCP server for seamless integration with Claude Code, Cursor, and other AI editors. All processing happens on your machine via node-llama-cpp with GGUF models — zero cloud dependency.