Has anyone seen analogues of reg.panel for working with api registrars?

Question

Domain name market

You need an inexpensive or open source solution to work with api domain registrars. On the Internet, only reg.panel was found. The tool is closed source, does not allow you to make your own changes. Well, it doesn't work very well. I would like to find a tool that will allow you to sell services, domain name registrars, on your domain. And it will allow you to modify it to suit your needs.

Answer 1

ispsystem.com e.g.
billmanager + ispmanager + .... depending on the list of desired services

Answer 2

rootpanel.ru