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
Build a custom CRM without the proprietary lock-in
Self-host your own scheduling page, no vendor required
Run AI models locally or connect to cloud, privately
Open source payment orchestrator for global transactions
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.
Your personal distributed filesystem
🕵️♂️ Collect a dossier on a person by username from 3000+ sites
Open-source coding agent for your IDE and terminal
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.
A native code editor for macOS
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
Self-hosted wiki with AI, compliance, and real-time editing
Effortless screen recording for macOS
Legally binding document signing for individuals and teams
Open Source DeepWiki: AI-Powered Wiki Generator for GitHub/Gitlab/Bitbucket Repositories. Join the discord: https://discord.gg/gMwThUMeme
Open-source workflow automation for developers
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
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
AI-powered PIM for managing product catalogs at scale
Build and deploy scalable storefronts with ease
Transform complex usage data into accurate, real-time billing
Open source marketing automation for everyone
Real-time observability for modern web applications
Claude-first paid-media operations skill for Claude Code across 12 ad platforms (Google, Meta, YouTube, LinkedIn, TikTok, Microsoft, Apple, Amazon, Reddit, Pint
Private meeting notes, no bots, files you own
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.
Design editor that opens Figma files, runs AI, and stays local
Voice-to-text that works offline, privately, on any app
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
Self-hostable voice agent platform with full model control
Open source kanban boards with unlimited everything
Secure, scalable API key management for developers
MediaCMS is a modern, fully featured open source video and media CMS, written in Python/Django and React, featuring a REST API.
Modern desktop accounting made simple and free
Build reliable AI agents with unified tool integration
The first AI agent that builds permissionless integrations through reverse engineering platforms' internal APIs.
Your web application for managing personal data.
Effortlessly manage events and sell tickets online
Your digital identity, beautifully organized
Organize thousands of photos with ease
Free open source home automation system for Linux, Windows, Raspberry Pi. Supports Z-Wave, Zigbee, MQTT, and 150+ devices.
Create powerful forms with ease and flexibility
Related tags
Frequently asked questions
How many open source open-source projects are there?
This registry tracks 110 projects tagged open-source, with 1,211,938 GitHub stars between them. The most-adopted is Godot at 117,369 stars.
Are these open-source projects free to use?
Yes — 89 of the 110 carry an explicit open-source licence across 6 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?
97 of the 110 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.