You asked about "community", well...
look like there is a fork of unity 8 named "yunit" here is their github repo:
This is a fork of Canonical's Unity 8 repository as of April 5, 2017. Following Mark Shuttleworth's announcement to abandon Unity 8 development, we are planning to continue working with the project.
There is another project named "Enjade" (Now being called "Artemis" I guess):
The Artemis Project aims to bring the best environments to continue the venerable Unity 7 desktop in the modern Linux space. With an open, friendly community and a willingness to make the Linux desktop more friendly, the Unity legacy will live on while bringing new innovations to the table.
It's going to be a plasma based environment that aims to bring Unity experience while getting new features continuously.
You can also make gnome shell to look like unity:
However I prefer myself to use a simple highly customizable Window manager instead of DE or at least a lightweight DE like xfce, it's been years that I'm using OpenBox so it never was a big deal for me in first place.