CRM and billing admin and client panel
I need a CRM and billing php open source application. All I want is my client to login and see his/her invoices and the total amount due. Also, I would like to be able to send notification emails to clients to remind them about their balance.

I have already tried the following.

SugarCRM :I does not have any billing information. It is pure CRM

BoxBilling : very slow

Siwapp : It has only admin properties. Clients cannot login

and many more...



Any help would be appreciated. 
Thanks!
CRM and billing admin and client panel
===

I need a CRM and billing php open source application. All I want is my client to login and see his/her invoices and the total amount due. Also, I would like to be able to send notification emails to clients to remind them about their balance.

I have already tried the following.

SugarCRM :I does not have any billing information. It is pure CRM

BoxBilling : very slow

Siwapp : It has only admin properties. Clients cannot login

and many more...



Any help would be appreciated. 
Thanks!