we are looking for a new SMS Portal software.

the software should be multilanguage (german, english at least) and should have a sms gateway to cardboardfish.

I don't look for a individual development, more for an existing script with some design changes.

the must haves are:

- very easy and not complicated at all.
- login with emailadress and password
- register as a customer (verify email flow)
- send SMS over a webfrontend
- upload a list of messages for mass sending
- buy sms credits with paypal or bank transfer
- generate a PDF invoice

The environment should be LAMP.