Hubzilla is a community developed open source project based on work introduced in Friendica by the Friendica community and which previously was named Redmatrix. The core design, the project mission, and software base itself were created/written primarily by Mike Macgirvin and represent the culmination of over a decade of software design using variations of this platform and an evolving vision of the role of communication software in our lives. Many others have contributed to this work, both conceptually and in terms of actual code (far too many to list individually).
Hubzilla is finding some alternative ways of getting around some roadblocks of Diaspora.