What is it?
WHNBilling was made with one objective. To develop into a fully automatic and affordable billing solution. WHNBilling has over 50+ features that allow you to develop your company and not worry about your billing system. WHNBilling will automatically invoice, and even send your customers a courtesy notice of their next billing date.

Admin Features:
Unlimited Customer Support
Automatic credit card billing on prorate or anniversary date of account signup
Quick and easy navigation system
One Time Invoicing System
Authorize.net Refund System
Reports System
Easy to setup signup emails, invoice headers and footers
Ability to mass email all active customers.
Multi-User login system
Trial System
New Interface for Admin / Clients!
Courtesy Email Notification
Search Lookup by Customer Name, Domain Name, Email, Credit Card
Editable Tax Information
Automatic Suspend System
Discount System
Coming Soon: ENom API Integration

Find more features & Information at their website: