Yesterday i found the Fork of BoxBilling named CircleBilling. BoxBilling is now dead for over 2 years.
Some Guys have decided to create a fork and start active development.
You find the fork here:
Official Forum: https://forum.circlebilling.com/
Github: https://github.com/CircleBilling/CircleBilling
If there any People are willing to help, i think the Team would be glad for every helping hand