codecrafters-io/build-your-own-x
Master programming by recreating your favorite technologies from scratch.
Every AI project I've evaluated for the practice, filed into the 16 buckets I actually think in. Not a trending list — a working log of what I looked at, what it does, and where it sits.
A snapshot, not a live feed. Star counts are frozen at 2026-06-20; the point is the shape of the shelf, not today's numbers.
126 tools evaluated · 16 bucketsstars as of 2026-06-20
Master programming by recreating your favorite technologies from scratch.
Python tool for converting files and office documents to Markdown.
The React Framework
Microsoft PowerToys is a collection of utilities that supercharge productivity and customization on Windows
LLM inference in C/C++
An extremely fast Python package and project manager, written in Rust.
Turn any PDF or image document into structured data for your AI. A powerful, lightweight OCR toolkit that bridges the gap between images/PDFs and LLMs. Supports 100+ languages.
Self-hosted AI workspace.
The open-source app everyone uses to manage agents at work
AI-powered job search system built on Claude Code. 14 skill modes, Go dashboard, PDF generation, batch processing.
An advanced guide to learn English which might benefit you a lot 🎉 . 离谱的英语学习指南/英语学习教程/英语学习/学英语
The open alternative to Salesforce, designed for AI.
We write your reusable computer vision tools. 💜
Compress tool outputs, logs, files, and RAG chunks before they reach the LLM. 60-95% fewer tokens, same answers. Library, proxy, MCP server.
💖🧸 Self hosted, you-owned Grok Companion, a container of souls of waifu, cyber livings to bring them into our worlds, wishing to achieve Neuro-sama's altitude. Capable of realtime voice chat, Minecraft, Factorio playing. Web / macOS / Windows supported.
AI-Powered Photos App for the Decentralized Web 🌈💎✨
The design language that makes your AI harness better at design.
A tool for creating and running Linux containers using lightweight virtual machines on a Mac. It is written in Swift, and optimized for Apple silicon.
Mattermost is an open source platform for secure collaboration across the entire software development lifecycle..
NVR with realtime local object detection for IP cameras
Your Personal AI super intelligence. Private, Simple and extremely powerful.
Beautiful & consistent icon toolkit made by the community. Open-source project and a fork of Feather Icons.
The open agent skills tool - npx skills
Talk to any LLM with hands-free voice interaction, voice interruption, and Live2D taking face running locally across platforms
Free, Open Source, Self-Hosted WhatsApp API Gateway
Open source voice AI platform. Self-hosted alternative to Vapi and Retell. On Prem, BYOK across Speech to Speech or LLM/STT/TTS, with a visual workflow builder, MCP native and telephony support.
A contact solver for physics-based simulations involving 👚 shells, 🪵 solids and 🪢 rods.
urllib3 is a user-friendly HTTP client library for Python
🌱 Private, quiet space for thinking. Simple app for .md files. LLM-friendly.
Music Assistant is a free, opensource Media library manager that connects to your streaming services and a wide range of connected speakers. The server is the beating heart, the core of Music Assistant and must run on an always-on device like a Raspberry Pi, a NAS or an Intel NUC or alike.
TypeScript/JavaScript SDK for Gemini and Vertex AI.
Post-training scripts and samples for NVIDIA Cosmos ecosystem
This is a fully HTTP based Pub/Sub Broker with a goal to simplify system architecture in SOA or Microservice architecture. It aims to solve the inter service communication problem.
💫 Toolkit to help you get started with Spec-Driven Development
An open-source AI agent that brings the power of Gemini directly into your terminal.
Lightweight coding agent that runs in your terminal
Pre-indexed code knowledge graph, auto syncs on code changes, for Claude Code, Codex, Gemini, Cursor, OpenCode, AntiGravity, Kiro, and Hermes Agent — fewer tokens, fewer tool calls, 100% local
an open source, extensible AI agent that goes beyond code suggestions - install, execute, edit, and test with any LLM
"CLI-Anything: Making ALL Software Agent-Native" -- CLI-Hub: https://clianything.cc/
Make Any Website into CLI & Use your logged-in browser by AI agent.
The first open-source harness builder for AI coding. Make AI coding deterministic and repeatable.
⌥ AI Coding agent for the terminal — hash-anchored edits, optimized tool harness, LSP, Python, browser, subagents, and more
A powerful AI coding agent. Built for the terminal.
Open-source & free — Battle-tested at Alibaba's scale. Hybrid architecture code review tool: deterministic pipelines + LLM Agent, precise line-level comments, built-in fine-tuned ruleset (NPE, thread-safety, XSS, SQL injection), OpenAI & Anthropic compatible.
A meta-skill that designs domain-specific agent teams, defines specialized agents, and generates the skills they use.
agent multiplexer that lives in your terminal.
OpenAI Plugins
The CLI and skills that turn any coding assistant into an expert at creating, evaluating, and deploying AI agents on Google Cloud.
Intercept and inspect Coding Agent API traffic from Claude Code, Codex CLI, Gemini CLI, Cursor CLI, OpenCode, Kimi/Kimi Code, Pi, and Hermes in a local trace viewer.
A lightweight, zero-dependency CLI tool to manage and activate capabilities for AI coding assistants (such as Claude Code, Cursor, Trae, etc.).
Curated directory of terminal-native AI coding agents and the harnesses that orchestrate them. Covers open-source tools (Pi, OpenCode, Aider, Goose), platform agents (Claude Code, Codex, Gemini CLI), parallel runners, autonomous loops, and agent infrastructure.
The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor and beyond.
A single CLAUDE.md file to improve Claude Code behavior, derived from Andrej Karpathy's observations on LLM coding pitfalls.
754 structured cybersecurity skills for AI agents · Mapped to 5 frameworks: MITRE ATT&CK, NIST CSF 2.0, MITRE ATLAS, D3FEND & NIST AI RMF · agentskills.io standard · Works with Claude Code, GitHub Copilot, Codex CLI, Cursor, Gemini CLI & 20+ platforms · 26 security domains · Apache 2.0
Agent Skills for Google products and technologies
A curated list of awesome Claude Skills, resources, and tools for customizing Claude AI workflows — particularly Claude Code
A skill file for removing AI tells from prose
Security scanner for AI agent skills. Detect vulnerabilities, malicious patterns, and security risks.
SkillOpt is a text-space optimizer that trains reusable natural-language skills for frozen LLM agents through trajectory-driven edits, validation-gated updates, and deployable best_skill.md artifacts.
A tremendous feat of documentation, this guide covers Claude Code from beginner to power user, with production-ready templates for Claude Code features, guides on agentic workflows, and a lot of great learning materials, including quizzes and a handy "cheatsheet". Whether it's the "ultimate" guide to Claude Code will be up to the reader :)
The ultimate all-in-one guide to mastering Claude Code. From setup, prompt engineering, commands, hooks, workflows, automation, and integrations, to MCP servers, tools, and the BMAD method—packed with step-by-step tutorials, real-world examples, and expert strategies to make this the global go-to repo for Claude mastery.
Cursor plugin specification and official plugins
The contents of /mnt/skills in Claude's code interpreter environment
🌐 Make websites accessible for AI agents. Automate tasks online with ease.
Browser automation CLI for AI agents
Browser Harness | Self-healing harness that enables LLMs to complete any task.
🔥 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.
🏝️ A CLI Tool to Automate Your Everyday Web Browser.
playwright stealth
If it's on the screen, it's an API. Control any desktop app via REST + MCP. Rust.
A fast, native browser automation CLI built from the ground up for AI agents, powered by Chrome DevTools Protocol. 63 commands covering navigation, interaction, screenshots, accessibility, network mocking, visual diffing, test generation, and more — all from a single binary.
A lightweight, self-hosted browser automation tool with a background daemon and CLI client. Tailored for agent harnesses.
Curated list of awesome browser automation tools and resources
利用AI大模型，一键生成高清短视频 Generate short videos with one click using AI LLM.
🎥 Make videos programmatically with React
Write HTML. Render video. Built for agents.
🚀 AI 全自动短视频引擎 | AI Fully Automated Short Video Engine
AutoClip : AI-powered video clipping and highlight generation · 一款智能高光提取与剪辑的二创工具
Agent Skills
Give Claude the ability to watch any video. /watch downloads, extracts frames, transcribes, hands it all to Claude.
An Open-Source Multimodal AIGC Solution based on ComfyUI + MCP + LLM https://pixelle.ai
HTML-native motion-graphics video workspace — 12 finished projects built on Hyperframes + GSAP. A teaching kit for students learning to build motion-graphics video pipelines end-to-end.
Persistent Context Across Sessions for Every Agent – Captures everything your agent does during sessions, compresses it with AI, and injects relevant context back into future sessions. Works with Claude Code, OpenClaw, Codex, Gemini, Hermes, Copilot, OpenCode + More
AI coding assistant skill (Claude Code, Codex, OpenCode, Cursor, Gemini CLI, and more). Turn any folder of code, SQL schemas, R scripts, shell scripts, docs, papers, images, or videos into a queryable knowledge graph. App code + database schema + infrastructure in one graph.
Build Real-Time Knowledge Graphs for AI Agents
YC (S26) | AI that knows what you've seen, said, or heard. Records everything you do, say, hear 24/7, local, private, secure. Connect to OpenClaw, Hermes agent and 100+ apps
Memory library for building stateful agents
GraphZep: A temporal knowledge graph memory system for AI agents in Typescript based on the Zep paper
Public repository for Agent Skills
A collection of projects designed to help developers quickly get started with building deployable applications using the Claude API
Access to Anthropic's safety-first language model APIs via Go
The CLI for the Claude API
The agent that grows with you
⚒ Evolutionary self-improvement for Hermes Agent — optimize skills, prompts, and code using DSPy + GEPA
A curated list of awesome skills, tools, integrations, and resources for Hermes Agent by Nous Research
Run Hermes Agent and OpenClaw on the same WeChat account
Comprehensive documentation for Hermes Agent by NousResearch — the self-improving AI agent (v0.2.0)
Comprehensive paid advertising audit & optimization skill for Claude Code. 250+ checks across Google, Meta, YouTube, LinkedIn, TikTok, Microsoft & Apple Ads with weighted scoring, parallel agents, industry templates, and AI creative generation.
MCP server to manage Facebook and Instagram Ads (Meta Ads)
An MCP tool that connects Google Ads with Claude AI/Cursor and others, allowing you to analyze your advertising data through natural language conversations. This integration gives you access to campaign information, performance metrics, keyword analytics, and ad management—all through simple chat with Claude, Cursor or Windsurf.
MCP server for managing ad campaigns across Google Ads, Meta Ads, LinkedIn Ads, and TikTok Ads. 100+ tools for campaign creation, performance analysis, keyword research, and budget optimization. Works with ChatGPT, Claude, Gemini CLI, Cursor, Codex, and Windsurf.
The Block Editor project for WordPress and beyond. Plugin is available from the official repository.
Enable AMP on your WordPress site, the WordPress way.
A plugin to restore the Classic Editor in WordPress.
Toronto Regional Real Estate Board (TRREB) PropTx API Listings Wordpress Plugin
Python wrapper for TA-Lib (http://ta-lib.org/).
The official Python client library for the Massive.com REST and WebSocket API.
A python packaged used to interact with the Interactive Brokers REST API.
An MCP server for Massive.com Financial Market Data
Open Source Routing Machine - C++ backend
Open Source Java enterprise application for storing, searching and retrieving data
GFW Geostore API
Python CNN Fear and Greed Index wrapper
A historical copy of CNN's Fear and Greed Dataset
A feature-rich command-line audio/video downloader
🕷️ An adaptive Web Scraping framework that handles everything from a single request to a full-scale crawl!
xAI's terminal AI coding agent (open-sourced 2026-07-16). Rust, 62 crates.
🪢 Open source AI engineering platform: LLM evals, observability, metrics, prompt management, playground, datasets. Integrates with OpenTelemetry, LangChain, OpenAI SDK, LiteLLM, and more. 🍊YC W23