Google Groups - Google Groups allows you to create and participate in online forums and email-based groups with a rich experience for community conversations.

MemberVault - MemberVault is a flexible platform that helps you to create, deliver, and sell your services, courses, memberships, subscriptions, etc.

Galette - Galette is a membership management web application towards non profit organizations.

Ruzuku - Ridiculously easy online courses

Bigtent - BigTent is a web-based organization and communication portal for groups.

Opentute - Opentute helps businesses to effortlessly launch a private eLearning and communication platform to engage teams and clients.