TidyHQ - Organization management tool to support membership, subscriptions, event planning, and outreach.
Kindle Robot - Send books to Kindle via a Telegram bot 📚🤖
Galette - Galette is a membership management web application towards non profit organizations.
Eplee - A simple and beautiful open-source ePub reader
Google Groups - Google Groups allows you to create and participate in online forums and email-based groups with a rich experience for community conversations.
FolioReaderKit - A Swift ePub reader and parser framework for iOS.