Octopress - A static blogging framework for hackers, based on Jekyll
Mighty Networks - Mighty Networks enables entrepreneurs, organizations, and companies to create and grow a community-powered brand.
DonorPerfect - Nonprofits use DonorPerfect Fundraising Software for their Donor Management, Grant & Gift Tracking, Moves Management, Mass Mailing needs and more.
Bigtent - BigTent is a web-based organization and communication portal for groups.
Rememble - Rememble is a 'washing line' for your digital bits and pieces.
Nabble - Nabble is a forum software that are embeddable and fully customizable with scripting language.