Backchannel Chat - Backchannel Chat is best in class discussion tool that is intended for teachers to streamline their class activities.
Google Groups - Google Groups allows you to create and participate in online forums and email-based groups with a rich experience for community conversations.
NowComment - NowComment is a complete suite of collaboration tools, streamlining group discussion, annotation, and curation of texts, images, and videos.
Membee - Membee is web-based membership management software.
Eduflow - Digital learning that actually teaches students something
Galette - Galette is a membership management web application towards non profit organizations.