Octopress - A static blogging framework for hackers, based on Jekyll
Google Groups - Google Groups allows you to create and participate in online forums and email-based groups with a rich experience for community conversations.
Rememble - Rememble is a 'washing line' for your digital bits and pieces.
DownToMeet - DownToMeet is a platform to organize, find, and attend group events.
DonorPerfect - Nonprofits use DonorPerfect Fundraising Software for their Donor Management, Grant & Gift Tracking, Moves Management, Mass Mailing needs and more.
Mighty Networks - Mighty Networks enables entrepreneurs, organizations, and companies to create and grow a community-powered brand.