Zing development has been developed by Igor Afanasyev and Julen Ruiz Aizpuru.
The project is open to external contributions and, as such, the GitHub project page contains the full list of contributors.
Zing has its roots in Pootle, which wouldn't exist without the tireless effort of their contributors. You can check the full list of the people who has contributed to Pootle in its AUTHORS file.