Find free and open source AI tools worth using.

REA gives your coding agent tools to inspect a program and explain what it does, from app behavior down to native binaries.

Plannotator enables plan and code review for coding agents. Annotate agent plans before they run, review diffs, and send structured feedback back to the agent. It provides agent skills for HTML artifacts, wireframes, plans, and diagrams.

HyperFrames is an open-source framework that turns HTML, CSS, media, and seekable animations into deterministic MP4 videos. It provides a CLI, agent skills, and a desktop Studio for creating and rendering video with AI coding agents.

ASD-STE100 Simplified Technical English rules, repurposed as a Claude Code skill for rewriting ambiguous agent-facing English. The skill targets agent-to-agent messages, tool descriptions, and error messages.

baoyu-skills is a collection of Agent Skills shared by Baoyu for daily work efficiency with AI Agents such as Claude Code and Codex. It covers content generation, AI generation, and utility tools for publishing and visual content.

Ian Xiaohei Illustrations is a Codex Skill for 16:9 hand-drawn body illustrations in Chinese articles. It turns one judgment, process, structure, state, or metaphor into a memorable Xiaohei image with sparse red, orange, blue annotations.

treg is an open-source, AGPL-licensed catalog of 3,800+ endpoints across 110 providers, letting agents call SEO, social, enrichment, ads, and scraping tools with one key, priced per call and with credentials injected server-side.

A collection of reusable, project-neutral AI agent skills. This repository is the canonical local source for first-party skill sources and reviewed third-party runtime installs, with guidance for safe maintenance and handling.

Screenshot to Code converts screenshots, mockups, Figma designs, and screen recordings into clean, functional code using AI, supporting HTML/Tailwind, HTML/CSS, React/Tailwind, Vue/Tailwind, Bootstrap, and Ionic/Tailwind.

Claude Code is an agentic coding tool that reads your codebase, edits files, and runs commands. It integrates with your development tools and handles git workflows through natural language. Available in terminal, IDE, desktop, and browser.

OpenHuman is a free, open-source personal AI for Mac, Windows and Linux that keeps data local and orchestrates fleets of agents. Built in Rust, it is positioned as a fast, efficient open-source agent harness.

OpenDesign is an open-source, local-first Claude Design alternative. It turns coding agents into a design engine for prototypes, landing pages, dashboards, slides, images, and video, with real files and HTML, PDF, PPTX, or MP4 export.

Happy is the open-source remote control for Claude Code, Codex, and other coding agents running on your own computers. Start, steer, approve, and review sessions from iOS, Android, or the web, with end-to-end encryption.

Cognee is an open-source agent memory platform that gives LLM agents persistent long-term memory across sessions. It combines graph, vector, and relational retrieval and runs self-hosted, in Docker, on-prem, or on Cognee Cloud.

QMD is a local-first mini CLI search engine for docs, knowledge bases, meeting notes, and other text. It combines BM25 full-text search, vector semantic search, and LLM re-ranking while running on-device via node-llama-cpp with GGUF models.

An open-source agent platform that runs inside your own infrastructure. Each AI coworker gets its own computer, browser, files, and tools, with company knowledge and permissions. Bring any AG-UI agent.

anydoc is an open-source Rust library that converts Word, PowerPoint, Excel, OpenDocument, RTF, EPUB, CSV, and PDF documents into clean GitHub-Flavored Markdown, with Node.js, Python, browser, WebAssembly, and CLI bindings.

Browser Harness is a thin, self-healing harness for browser agents built directly on CDP. Agents can edit their own helpers mid-task, so the harness improves with every task and enables LLMs to complete browser tasks.

DeepSeek Harness (dsh) is an open-source agent harness in developer preview. Every agent capability is implemented as a composable Cordis plugin for models, tools, skills, sessions, sandboxes, storage, loops, scheduling, and the UI.

omp is a coding agent for the terminal with subagents, plan mode, LSP, DAP, memory, hashline edits, and time-traveling rules, powered by a native Rust core. Built by Stencil Labs.

Harbor is a framework from the creators of Terminal-Bench for evaluating and optimizing agents and language models in container environments. It supports arbitrary agents, custom benchmarks, parallel cloud experiments, and rollouts for RL

Open-source infrastructure that runs harnesses like Codex, Claude Code, and Hermes as pluggable agent backends, letting products run tasks, retrieve results, and switch harnesses through one API.

Zed is a high-performance, multiplayer code editor from the creators of Atom and Tree-sitter. It is crafted for speed and collaboration with humans and AI.

Tolaria is a free, open-source desktop app for macOS, Windows, and Linux that organizes Markdown knowledge bases with local files, integrated Git version control, and AI support.

Warp is an agentic development environment, born out of the terminal, offering open infrastructure to build, measure, and interact with agents across the SDLC so teams ship more and spend less.

OpenWorker is a free, open-source AI agent that runs on your computer and works in everyday tools to turn requests into finished deliverables, checking in before important actions. Bring your own model or run local with Ollama.

OpenKnowledge is a beautiful, AI-native markdown editor and IDE for knowledge bases, LLM wikis, specs, notes, and agent second brains. It works with Claude, Codex, and other harnesses via MCP/CLI and is private, local, and free.

GenOffice is a free, open-source AI office suite for macOS, Windows and Linux. It opens and saves .docx, .xlsx and .pptx files, edits PDF, Markdown and HTML, and includes a built-in AI agent with Genspark credits or your own API key.

Chroma is open-source search infrastructure for AI. It provides fast, serverless, scalable infrastructure for vector, sparse vector, full-text, regex, and metadata search, built on object storage for multi-tenant indexes.

GraphRAG is a modular graph-based Retrieval-Augmented Generation system that extracts a knowledge graph from unstructured text, builds a community hierarchy, generates summaries, and supports global, local, DRIFT, and basic search.

DeepSeek-V3 is a Mixture-of-Experts language model with 671B total parameters and 37B activated per token. It supports a 128K context and is available in Base and Chat variants with open weights for local deployment and API use.

Qdrant is a high-performance, massive-scale vector database and vector similarity search engine for next-generation AI applications. It stores, searches, and manages vectors with payload filtering. Also available as managed Qdrant Cloud.

Crawl4AI is an open-source web crawler and scraper for LLMs and AI agents. It turns any website into clean, LLM-ready Markdown for RAG, agents, and data pipelines, and can also be used hosted with one key.

Helicone is an open source LLM observability and AI gateway platform. It provides routing and monitoring for reliable AI apps, letting developers monitor, evaluate, and experiment with one line of code.

PaddleOCR is a powerful, lightweight OCR and document parsing toolkit that turns PDFs and images into structured, LLM-ready data. It supports 100+ languages, JSON and Markdown output, and helps build RAG and Agentic applications.