Open source open-source projects
Every project in the registry tagged open-source, ranked by real GitHub adoption.
Free 2D and 3D game engine for cross-platform projects
LLM-ready web crawler built for AI data pipelines
CLI proxy that reduces LLM token consumption by 60-90% on common dev commands. Single Rust binary, zero dependencies
Easy to maintain open source documentation websites.
Self-hosted timeline for quick notes, logs, and snippets
Build a custom CRM without the proprietary lock-in
Self-host your own scheduling page, no vendor required
A refreshingly simple data-driven game engine built in Rust
Open source payment orchestrator for global transactions
Run AI models locally or connect to cloud, privately
A full desktop environment that runs in your browser
Open-source coding agent for your terminal, built in Rust and on a journey of continuous community improvement. Issues and PRs welcome.
🕵️♂️ Collect a dossier on a person by username from 3000+ sites
Your personal distributed filesystem
Network-wide ads & trackers blocking DNS server
Open-source coding agent for your IDE and terminal
Fully autonomous AI Agents system capable of performing complex penetration testing tasks
The next open source file uploader for web browsers :dog:
Secure secret management for modern development teams
Wiki.js | Next Generation Open Source Wiki
Full-stack Python platform for web apps and internal tools
An open-source RAG-based tool for chatting with your documents.
Universal SEO skill for Claude Code. 25 sub-skills + 18 sub-agents covering technical SEO, E-E-A-T, schema, GEO/AEO, backlinks, local SEO, maps intelligence, se
Task manager built for deep work, privacy, and focus
Debug, evaluate, and monitor your LLM applications, RAG systems, and agentic workflows with comprehensive tracing, automated evaluations, and production-ready d
A native code editor for macOS
AI agent that autonomously handles real-world tasks
Effortless screen recording for macOS
Legally binding document signing for individuals and teams
Open-source workflow automation for developers
Open Source DeepWiki: AI-Powered Wiki Generator for GitHub/Gitlab/Bitbucket Repositories. Join the discord: https://discord.gg/gMwThUMeme
Secure, open-source document signing for everyone
Zero-knowledge encrypted notes that sync across all devices
Free, open-source framework for cross-platform game development
Open-source integration platform for seamless workflows
Privacy-first survey and experience management platform
Lightning-fast search for massive datasets
Apereo CAS - Identity & Single Sign On for all earthlings and beyond.
AI-powered PIM for managing product catalogs at scale
Build and deploy scalable storefronts with ease
Open source marketing automation for everyone
Transform complex usage data into accurate, real-time billing
Claude-first paid-media operations skill for Claude Code across 12 ad platforms (Google, Meta, YouTube, LinkedIn, TikTok, Microsoft, Apple, Amazon, Reddit, Pint
Voice-to-text that works offline, privately, on any app
AutoClip｜一个链接，一键出片。开源 AI 视频剪辑桌面工具，将播客、访谈、课程等长视频自动剪成短视频，生成字幕、封面和发布文案，适配抖音、小红书、TikTok、Reels 与 YouTube Shorts。Open-source AI video clipping & content repurposing.
Private meeting notes, no bots, files you own
Design editor that opens Figma files, runs AI, and stays local
Real-time observability for modern web applications
Libre Hardware Monitor is free software that can monitor the temperature sensors, fan speeds, voltages, load and clock speeds of your computer.
Open-source document sharing with powerful analytics
Status page and uptime monitoring for growing teams
Visual web development with code-level control
Drag and drop page builder library written in vanilla javascript without dependencies or build tools.
🏋 Modern open-source fitness coaching platform. Create workout plans, track progress, and access a comprehensive exercise database.
Codebase intelligence for AI and humans: code health scores, auto-generated docs, git analytics, dead code detection, and architectural decisions via MCP.
Examples and server integrations for generating the Swagger API Specification, which enables easy access to your REST API
Intercept, modify, and debug HTTP(S) requests effortlessly
Related tags
Frequently asked questions
How many open source open-source projects are there?
This registry tracks 185 projects tagged open-source, with 1,890,244 GitHub stars between them. The most-adopted is Godot at 119,413 stars.
Are these open-source projects free to use?
Yes — 163 of the 185 carry an explicit open-source licence across 5 distinct licences, so there is no licence fee. Where a project also sells a hosted or enterprise version, the self-hosted path remains free.
Which open-source project should I choose?
The list above is ranked by GitHub stars, but stars measure attention rather than fit. Check three things on each card: the licence (permissive versus copyleft), the language it is written in, and the last-push date — a high-star project that has not been pushed in a year is a liability.
Are these open-source projects still maintained?
163 of the 185 were pushed in the last 90 days, and every card shows its exact last-push date so you can see the rest. Sort your shortlist by that date before committing to a migration.