Google Groups - Google Groups allows you to create and participate in online forums and email-based groups with a rich experience for community conversations.
Houseparty - Brining empathy to online communication.
DownToMeet - DownToMeet is a platform to organize, find, and attend group events.
Booyah - Video chat with up to 12 friends at the same time.
Mighty Networks - Mighty Networks enables entrepreneurs, organizations, and companies to create and grow a community-powered brand.
Airtime - Hang out with group video, share music & videos