Robust subscription support for Ruby on Rails apps using Stripe, including out-of-the-box pricing pages, payment pages, and subscription management for your customers. Also makes it easy to manage logic related to new subscriptions, upgrades, downgrades, cancellations, payment failures, and streamlines hooking up notifications, metrics logging, etc.

To see an example of Koudoku in action, please visit Koudoku.org.

Koudoku is authored and maintained by Andrew Culver. If you find it useful, consider checking out Churn Buster. It's designed to help you handle the pain points you'll run into when doing payments at scale.