Open Source

Cool Projects on GitHub

The best open-source repositories, tools, and projects worth starring.

56 tools

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Caveman

Featured

Open Source

Claude Code skill that cuts token usage by 65% by making the AI speak in compressed caveman shorthand — same results, far fewer tokens.

claude codetokenscost
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CL4R1T4S

Featured

Open Source

A massive crowd-sourced collection of leaked system prompts from ChatGPT, Claude, Gemini, Grok, Cursor, and dozens more AI products.

system promptstransparencyprompt engineering
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Claude Mem

Featured

Open Source

Persistent memory across sessions for any AI agent — captures, compresses, and injects context back into Claude Code, Codex, Gemini, Copilot, and more.

memoryagentsclaude code
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CSM (Sesame)

Featured

Open Source

Sesame AI Labs' Conversational Speech Model — ultra-realistic voice generation with natural prosody and emotion.

text-to-speechvoiceaudio
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Kokoro

Featured

Open Source

Fast, lightweight open-source TTS model (82M params) — high-quality voice synthesis that runs locally with minimal compute.

text-to-speechvoiceaudio
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MarkItDown

Featured

Open Source

Microsoft's open-source Python tool that converts any file or Office document — PDFs, Word, Excel, PowerPoint, images — into clean Markdown.

markdownpdfdocument conversion
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n8n

Featured

Open Source

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

automationworkflowno-code
Freemium
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Odysseus

Featured

Open Source

Self-hosted AI workspace — a private, open-source alternative to commercial AI platforms you fully control.

self-hostedworkspaceprivacy
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Orpheus TTS

Featured

Open Source

Human-sounding open-source TTS with emotional expression — real-time capable, LLM-based speech synthesis by Canopy AI.

text-to-speechvoiceaudio
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Ruflo

Featured

Open Source

The leading agent meta-harness for Claude — deploy multi-agent swarms, coordinate autonomous workflows, and build conversational AI systems.

agentsswarmsclaude
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Taste Skill

Featured

Open Source

Gives your AI agent good taste — stops it from generating boring, generic slop by injecting aesthetic judgment into every output.

writingclaude codecreativity
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Zonos

Featured

Open Source

Zyphra's open-weight TTS model trained on 200k+ hours — expressive multilingual speech matching top commercial providers.

text-to-speechvoice cloningaudio
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AI Engineering Hub

Open Source

In-depth tutorials and notebooks on LLMs, RAG pipelines, and real-world AI agent applications.

tutorialsragllm
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AI Job Search

Open Source

AI-powered job search framework built on Claude Code — evaluates postings, tailors your CV, writes cover letters, and preps you for interviews.

job searchclaude codeopen source
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Anthropic Cybersecurity Skills

Open Source

817 structured cybersecurity skills for AI agents, mapped to MITRE ATT&CK, NIST CSF 2.0, D3FEND, and more — works with Claude Code, Cursor, Copilot, and 20+ platforms.

cybersecurityagentsmitre
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Awesome Design.md

Open Source

A curated collection of 70+ DESIGN.md files reverse-engineered from real websites — drop one into your project and let AI coding agents generate a UI that matches the brand.

markdownai agentsopen source
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Browser Use

Open Source

Open-source browser automation platform that lets AI agents use the internet like a human — click, type, navigate, and extract data from any website.

browser automationai agentsweb scraping
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Claude Ads

Open Source

Claude Code skill for running paid-media audits and operations across 12 ad platforms.

advertisingclaude code skillmarketing
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Claude Code Router

Open Source

Local control plane that routes Claude Code (and other AI agents) across different models, tools, and providers.

claude codellm routingdeveloper tools
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Claude Task Master

Open Source

AI-powered task-management system that drops into Cursor, Lovable, Windsurf, and other AI coding tools.

task managementclaude codeai agents
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Crawl4AI

Open Source

Open-source, LLM-friendly web crawler and scraper that outputs clean markdown and structured data built for RAG and AI pipelines.

web scrapingragllm
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Dub

Open Source

Open-source link-shortener and attribution platform used by teams like Framer, Perplexity, and Superhuman.

link shorteneranalyticsattribution
Freemium
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Find Skills

Open Source

Claude Code skill that discovers and installs the right agent skill for whatever you're working on, from the Vercel Labs skills package manager.

claude codeskillsagents
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Graphify

Open Source

Claude Code/Cursor/Codex skill that turns a codebase — docs, SQL schemas, configs, PDFs included — into a queryable knowledge graph.

knowledge graphclaude codecode analysis
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Graphiti

Open Source

Open-source framework for building real-time, temporally-aware knowledge graphs for AI agents.

knowledge graphai memoryagents
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Hoppscotch

Open Source

Open-source API development ecosystem — an alternative to Postman and Insomnia, for web, desktop, and CLI.

api testingdeveloper toolsopen source
Freemium
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Humanizer

Open Source

Claude Code skill that strips AI tells from generated text, making it read naturally as human-written prose.

writingclaude codeai detection
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img2threejs

Open Source

Converts a reference image of an object into a procedural, animation-ready Three.js model — built from primitives, shaders, and generated geometry instead of photogrammetry.

coding agentopen source
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Impeccable

Open Source

A design skill for AI coding agents that gives them 23 precise commands and 59 detector rules to stop shipping "AI slop" UI and start producing polished, on-brand interfaces.

claude codeskillsai agents
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Langflow

Open Source

Low-code visual builder for AI agents and workflows — drag-and-drop LangChain-style pipelines with instant API deployment.

low-codeai agentsworkflow builder
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Ling

Open Source

MoE LLM with RL-trained reasoning from InclusionAI — open-source, multilingual, built for complex reasoning tasks.

llmmoereasoning
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LLM Wiki

Open Source

Andrej Karpathy's pattern for AI-maintained knowledge bases that compound over time — a durable alternative to re-querying RAG on every question.

llmknowledge baserag
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Marketing Skills

Open Source

A plug-and-play library of marketing skills for Claude Code and AI agents — CRO, copywriting, SEO, analytics, and growth engineering.

marketingseocro
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Maxun

Open Source

Open-source no-code platform that turns any website into a structured API — build web scrapers and crawlers by clicking, not coding.

web scrapingno-codedata extraction
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NoSignups

Open Source

Directory of 150+ free, open-source web tools that need zero signup — design, dev, media, productivity, and privacy utilities.

directoryopen sourceno signup
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NVIDIA Nemotron

Open Source

Family of open-weight models with hybrid Mamba-Transformer architecture and 1M-token context window. Designed for specialized AI agents with multimodal support across video, audio, image, and speech.

open-sourcellmreasoning
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Open WebUI

Open Source

Self-hosted, user-friendly chat interface for local and API-based LLMs — supports Ollama, OpenAI-compatible APIs, RAG, and more.

self-hostedchat uiollama
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OpenHands

Open Source

AI software engineering agent platform that can write code, run commands, browse the web, and call APIs to complete real dev tasks.

ai agentscoding agentsoftware engineering
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OpenSEO

Open Source

Open-source, pay-as-you-go alternative to Semrush and Ahrefs, with a built-in MCP server and AI agent skills.

seomcpagent skills
Freemium
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OSINT Skill

Open Source

Claude Code skill that turns a name or handle into a scored OSINT dossier — psychoprofile, career map, and confidence grades.

osintclaude coderesearch
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Pi

Open Source

Unified AI agent toolkit — single LLM API, agent loop, TUI, and coding agent CLI in one TypeScript package.

agentstypescriptcli
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Pocketbase

Open Source

Open-source realtime backend — database, auth, file storage, and admin UI — in a single executable file.

backenddatabaseself-hosted
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Postiz

Open Source

Open-source, agentic social media scheduling and publishing tool.

social mediaschedulingcontent
Freemium
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Repomix

Open Source

Packs an entire code repository into a single, AI-friendly file for feeding into LLMs like Claude, ChatGPT, or Gemini.

developer toolsllmcode context
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Ring-V2

Open Source

Reasoning MoE LLM open-sourced by InclusionAI — Mixture-of-Experts architecture with strong reasoning capabilities.

llmmoereasoning
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Scout

Open Source

Free lead-generation CLI that scrapes and enriches profiles from Instagram, TikTok, LinkedIn, GitHub, and more.

lead generationweb scrapingsales
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SkillOpt

Open Source

Optimizes natural-language skill documents for AI agents without touching model weights — evolving skills through rollouts, reflection, bounded edits, and validation.

ai agentsopen sourceskills
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Stanford CS 229 Cheatsheets

Open Source

VIP cheatsheets for Stanford's CS 229 Machine Learning course — concise visual summaries of every major ML concept.

machine learningeducationstanford
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Step-3.7-Flash

Open Source

Fast reasoning model by StepFun offering high-speed inference for complex tasks. Open-source model optimized for speed without sacrificing reasoning quality.

reasoningfast-inferencellm
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Stirling PDF

Open Source

Free, open-source PDF editor and processor — merge, split, convert, compress, OCR, and edit PDFs, self-hosted or via web app.

pdfdocument toolsself-hosted
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Strix

Open Source

Autonomous pentesting platform that finds, validates, and auto-fixes vulnerabilities across APIs, web apps, code, infrastructure, and cloud — with merge-ready PRs and CI/CD gating.

securitypentestingopen source
Freemium
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Trigger.dev

Open Source

Open-source platform for building and deploying fully-managed AI agents and background workflows.

background jobsai agentsworkflow automation
Freemium
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User Research Skill

Open Source

End-to-end user research skill for AI agents — AI interviews, synthetic users, quant surveys, and participant recruitment in one toolkit.

user researchagentsux
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Vane

Open Source

Open-source AI-powered answering engine — ask questions, get cited answers, self-host for full control.

searchanswering enginetypescript
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VibeVoice

Open Source

Microsoft's open-source voice AI framework — long-form, multi-speaker text-to-speech and transcription, plus a lightweight real-time streaming TTS model.

voice aitext-to-speechopen source
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Video Shotcraft

Open Source

AI agent skill that turns Claude Code or Codex into a motion-design studio for cinematic product videos.

video generationclaude code skillremotion