Google Groups - Google Groups allows you to create and participate in online forums and email-based groups with a rich experience for community conversations.
ArchitectUI - Modern dashboard template for bootstrap 4
Membee - Membee is web-based membership management software.
Flatlogic - Business Software: AI-Driven Solutions at Speed.
Galette - Galette is a membership management web application towards non profit organizations.
PlainAdmin - PlainAdmin is an Open-source freemium Bootstrap 5 based vanilla JS multipurpose admin template comes with - all essential dashboard components, pages, UI elements, charts, graphs, libraries and everything you may need for a data-rich backends.