Google Groups - Google Groups allows you to create and participate in online forums and email-based groups with a rich experience for community conversations.
HubSpot - Grow Better With HubSpot: Software that's powerful, not overpowering. Seamlessly connect your data, teams, and customers on one CRM platform that grows with your business.
DownToMeet - DownToMeet is a platform to organize, find, and attend group events.
MailChimp - MailChimp is the best way to design, send, and share email newsletters.
Mighty Networks - Mighty Networks enables entrepreneurs, organizations, and companies to create and grow a community-powered brand.
Marketo - Marketo's powerful marketing automation software helps marketers master the art & science of digital marketing to engage customers and prospects.