📢 Sponsored: Check out Susan's Sudoku - A free daily sudoku puzzle.

rails.market
Intermediate

keygen

A fair source software licensing and distribution API built with Ruby on Rails.

Updated Jun 13, 2025
By Zeke Gabrielse
Open Source Real World Example Free Standalone App
Price: Free

Description

Keygen is a fair source software licensing and distribution API, built for developers, by developers. Use Keygen to add license key validation, entitlements, and device activation to your business's desktop apps, server applications, on-premise software, and other products.
Software licensing for everyone

Keygen comes in two editions. Keygen CE is our Community Edition, and is free (as in beer) to self-host for personal and commercial use. Keygen EE is our Enterprise Edition, and it requires a license key to use. Keygen EE comes with dedicated support, as well as enterprise-grade features like request logs, audit logs, permissions, environments, and more.
We built Keygen to make software licensing accessible to everyone.

This is a great reference project to learn how Zeke built and managed all this stuff. There is actually a fantastic IndieRails podcast episode where he talks all about his experience. Highly recommend checking that out if you're at all interested.
Visit Website

More "Open Source" Projects

RailsDevs

The reverse job board for Ruby on Rails developers.

By Joe Masilotti View Details →

Wavclouds (iOS/Android)

Turbo iOS/Android Apps for Wavclouds, with custom tab bar, push notifications, and native authentication

By Wavclouds View Details →

HostedGPT - A free ChatGPT clone

A free, and open-source ChatCPT alternative built using the latest Ruby on Rails and Hotwire features.

By Keith Schacht View Details →

More "Real World Example" Projects

Maybe

The OS for your personal finances.

By Josh Pigford View Details →

Campfire

Super simple group chat, without a subscription. And you get the code, too.

By 37Signals View Details →

HCB by Hack Club

🏦 The neobank built for nonprofits.

By Sam Poder View Details →

More "Free" Projects

RubyLLM

A delightful Ruby way to work with AI through a unified interface to Anthropic, AWS Bedrock Anthropic, DeepSeek, Ollama, OpenAI, Gemini, OpenRouter, and any OpenAI-compatible API.

By Carmine Paolino View Details →

Kamalify

Create a working Kamal config by just filling out a form.

By Unagi View Details →

Writebook

Instantly publish your own books on the web for free, no publisher required.

By 37Signals View Details →

More "Standalone App" Projects

StarryWeather

A modern weather application built with Ruby on Rails and iOS, featuring real-time weather data, beautiful UI animations, and seamless cross-platform integration.

By Andrea Fomera View Details →

Writebook

Instantly publish your own books on the web for free, no publisher required.

By 37Signals View Details →

DailyLog

A Ruby on Rails web application that uses Turbo Native, iOS, and Android app to track my daily habits like exercise, medication, food, and water.

By Joe Masilotti View Details →

Stay updated with the latest Rails projects

Join our newsletter to get updates on new Rails projects and resources.

    We won't send you spam. Unsubscribe at any time.
    Built with ConvertKit