BILLmanager | Web Hosting Billing Software
https://www.ispsystem.com/software/billmanager
BILLmanager is an all-in-one web hosting billing software. It provides billing automation, service provisioning, client portal & back office and support center.
BILLmanager and BILLmanager Corporate | LeaderSSL
https://www.leaderssl.com/ru/bill_manager
BILLmanager. It is the multifunctional platform for hosting business and others. BILLmanager Corporate. Automated billing system. Client/Admin area.