6Tribes!

Google Groups is all about helping users connect with people, access information, and communicate effectively over email and on the web. Now theres a new version on the block. We didnt want to say it, but yes, its new and improved.

Fleep is a messenger for your teams and projects. It enables communication within and across organizations - be it your team chats, project communication or 1:1 conversations.

Free group website, membership database, listserv mailing list, payments and more - GroupSpaces is a market leader in online group management software, providing comprehensive, simple to use tools to help manage your group more quickly and efficiently. Easy-to-use, secure & time-saving. Used by 10 000s of membership groups. Try it now!

My Town Circle operates much like your college club fair. It provides people with an exciting forum to promote and explore hobbies, groups and events, all in one-stop-shop! Did we mention its free?

Create a free embeddable forum, mailing list, photo gallery, news and blog. All apps are fully customizable, simple, instant setup, choose different formats and skins! Add your free forum or any other hosted application to your website quick and easy!

BigTent is a web-based organization and communication portal for groups. Groups can plan events, manage memberships, host discussion forums, collect payments, and organize subgroups. Nearly all functionality (e.g., forums) of BigTent is free. However, there is a small transaction fee to collect membership dues or event payments.

Mighty Networks is where communities learn and share together in groups. Mightybell Communities are designed to grow an organization of local chapters, or a network of learning or discussion groups around particular projects or interests. Mighty Networks is unique in giving organizers the ability to create and publish collections of content that appear in every group. Members of those groups can use this community content, create their own content, privately chat with other members, or organize meetups. »