Hello I know that OptiGold exists, however I have been wondering what ISP Billing software is out there. At the moment I currently bill my customers manually at the end of each month, but as I grow I really need to automate it a little, most are paying via either PayPal or Authorize.net , I have looked into WHMCS but it is more aimed at hosting rather than ISPs. Hope you guys can suggest something that is helpful that I can try out. Many Thanks Rob Putt