Kill Bill - Open-Source Subscription Billing & Payment Platform

•    Java

Kill Bill is the open-source subscription billing and payments platform. It supports Subscription engine, with plans management (trial, upgrade, downgrade, etc.), support of add-ons, bundles with multiple subscriptions, Invoicing engine, supporting different billing alignments, recurring and one-time charges, international tax, metered billing, Payment state machine, with payment routing capabilities, supporting dozen of gateways and lot more.

cashier-stripe - Laravel Cashier provides an expressive, fluent interface to Stripe's subscription billing services

•    PHP

Laravel Cashier provides an expressive, fluent interface to Stripe's subscription billing services. It handles almost all of the boilerplate subscription billing code you are dreading writing. In addition to basic subscription management, Cashier can handle coupons, swapping subscription, subscription "quantities", cancellation grace periods, and even generate invoice PDFs. Documentation for Cashier can be found on the Laravel website.

cashier

•    PHP

Laravel Cashier provides an expressive, fluent interface to Stripe's subscription billing services. It handles almost all of the boilerplate subscription billing code you are dreading writing. In addition to basic subscription management, Cashier can handle coupons, swapping subscription, subscription "quantities", cancellation grace periods, and even generate invoice PDFs. Documentation for Cashier can be found on the Laravel website.

koudoku - Robust subscription support for Rails with Stripe.

•    Ruby

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.

Zenbership - Membership Management Platform

•    PHP

Zenbership is a membership management platform for online businesses facilitating the acquisition, monetization, and retention of members. The software is designed to act as a central hub for your employees, combining multiple tools into one solution, and automating tasks like member registration, renewals, and marketing. It combines event planning, CRM, a CMS, invoicing, subscription management, marketing tools (like e-mail campaigns), a shopping cart, and secure content delivery.

final-form - 🏁 Framework agnostic, high performance, subscription-based form state management

•    Javascript

In the interest of making 🏁 Final Form the best library it can be, we'd love your thoughts and feedback. Take a quick survey.

react-final-form - 🏁 High performance subscription-based form state management for React

•    Javascript

In the interest of making 🏁 React Final Form the best library it can be, we'd love your thoughts and feedback. Take a quick survey.

cloudwatch-logs-subscription-consumer - A specialized Amazon Kinesis stream reader (based on the Amazon Kinesis Connector Library) that can help you deliver data from Amazon CloudWatch Logs to any other system in near real-time using a CloudWatch Logs Subscription Filter

•    Java

The CloudWatch Logs Subscription Consumer helps Java developers consume a real-time feed of CloudWatch Logs data for custom processing, analysis, or loading to other systems.

Typo3

•    PHP

TYPO3 is an enterprise class Web CMS written in PHP/MySQL. It's designed to be extended with custom written backend modules and frontend libraries for special functionality. It has very powerful integration of image manipulation.

Cloud Business Services

ISV Application Accelerator for business management of Cloud Applications build on Windows Azure or any hosting platform. Cloud Business Services is a strong framework for integrating business management (billing, meetering, monitoring and subscription management).

Carbon.Net

application foundation system,including organization structure,rights management,user management,event subscription etc.

ReNukes

ReNukes is a fork of JBoss Nukes 1.x with a focus on user management and metrics collection. In effect, ReNukes replaces the subscription model of Nukes with a managed customer account model while adding detailed management metrics reporting.

servicecomb-service-center - A standalone service center to allow services to register their instance information and to discover providers of a given service

•    Go

Apache ServiceComb Service-Center is a Restful based service-registry that provides micro-services discovery and micro-service management. It is based on Open API format and provides features like service-discovery, fault-tolerance, dynamic routing, notify subscription and scalable by design. It has high performance cache design and separate entity management for micro-services and their instances. It provides out of box support for metrics and tracing. It has a web portal to manage the micro-services. Project documentation is available on the ServiceComb website. You can also find full document here.

Listmonk - High performance, self-hosted newsletter and mailing list manager with a modern dashboard

•    Go

listmonk is a standalone, self-hosted, newsletter and mailing list manager. It is fast, feature-rich, and packed into a single binary. It uses a PostgreSQL database as its data store. It has been in active use at zerodha.com for several months where it has processed hundreds of campaigns and tens of millions of e-mails.

github-for-jira - Connect your code with your project management in Jira

•    TypeScript

Connect your Github code with your project management in Jira. A separate Jira subscription is required. With two of your most important tools connected, you'll spend less time managing projects and more time working on them. This integration is an open source project, built and maintained by Atlassian. This app officially supports GitHub.com and Jira Cloud. Support for GitHub Enterprise and/or Jira server may be considered in the future.

rails-recurly-subscription-saas

•    Ruby

An example Rails 3.2 app with recurring billing using Recurly for a membership or subscription site.

monospace-rails - Sample Rails application using Stripe to charge a subscription

•    Ruby

Sample Rails application using Stripe to charge a subscription

angular2-busy - Show busy/loading indicators on any promise, or on any Observable's subscription.

•    TypeScript

Angular 2 Busy: show busy/loading indicators on any promise, or on any Observable's subscription

Servicebot - Open source service automation platform

•    Javascript

ServiceBot is a platform for a business to sell their services and automate the administrative tasks such as billing and invoicing. Create an online store for your subscription-box service, web design agency, photography business and much more! Start selling your services online within minutes.

awesome-weekly - An "awesome" type curated list of quality weekly subscription newsletters from the software world

An awesome type curated list of quality weekly subscription newsletters from the software world. Pull requests happily accepted.