ZBilling is a Portuguese Startup Company created by Rafael Rocha.
In the past there was a huge gap between PHP Solutions and ASP.NET Solutions, Why? Price! But after .NET Framework Open Source comes to life this gap is about to disappear.
So ZBilling makes all sense when you are looking for a cross platform solution (Linux, Mac and Windows) and cross device (IPhone, Androids and Windows Phones) with a great price.
ZBilling was created with real people for real customers. We hope you enjoy this great product.
Best Regards, Rafael Rocha