OK guys, I propose to take a look at synx team work.
Look at the github activity - they seems to be  pretty active there.

https://github.com/SyndicateLtd/SyndicateQt

 12,100 commits
 1 branch
 394 releases
 318 contributors

Fuzzbawls and lvilar [Doc] 3.3.0 Notable Changes
Latest commit 086bb4a  20 days ago

This looks nice. They have more than 12000 commits to 1 branch and more than 300 contributors and the last commit happened 20 days ago.
Seems the project is not abandoned by its team.