I am using cpanel / WHM system on my server and was looking for a billing system which can be integreted inside.

could anyone help me with this please.

you have written you want billing system integrated inside on your server. But please specify what you want to say with integrated inside .:)

well wat i mean by integrated inside is that users can come and signup for accounts and the accounts are created in WHM.

The customer information is stored in the backend system from where in the customer can also see / update his details and automatic invoices can be generated etc. Incase a sites comes for renewal there can be an option of automatically deactivating the site from WHM. Things like this.

Anyway if all this is not possible i would at least want a gud online billing system (which probably is open source also so that if i want to modify the same to do some backend integration i can do the same)

anand_gupta,

The closest one I know of is by Voxel.net and is
currently free:
Client Billing Management System (http://www.voxel.net/projects/cbms) .
Which also freely distributes TicketSmith support system.