Zelos - A very simple app for mobile teams - tasks and chats on desktop and mobile.
Unlock - Monetize your content with a few lines of code
Mailman 3 - Dedicated Mailman 3 installation. Unlimited lists/configuration. Free subdomain at mailman3.com. Dedicated support for list admins.
ZELF - Instant money in messengers
Google Groups - Google Groups allows you to create and participate in online forums and email-based groups with a rich experience for community conversations.
MonetizeJS - Modern payment platform, no server required.