The list is taken from an article I have just read
Gehl, R. W. (2015). The case for alternative social media. Social Media+ Society, 1(2), 2056305115604338.
GNU social: http://gnu.io/
•• This is the codebase for a large range of federated microblogging sites.
Independent Microblogging Service: https://indy.im/
•• This is an example installation of GNU social.
•• Like GNU social, Diaspora is a federated system. It is installed on a range of servers around the world.
•• rstat.us is also a federated system.
These sites can be accessed using Tor. Research for this article was drawn from interviews with several Tor hidden service-based
social networking site users and administrators. With one exception, these interviews were conducted on condition that
I do not publicize these sites.
You can find more here at https://socialmediaalternatives.org/