diaspora* is still a thing, and what you describe looks like its concept of "aspect", which was developed before google+ " circles". It is AGPL, you're welcome

diaspora* is still a thing, and what you describe looks like its concept of "aspect", which was developed before google+ " circles". It is AGPL, you're welcome to contribute or fork it. https://github.com/diaspora/diaspora https://github.com/diaspora/diaspora