Membership/Subscripe free script need it

Hy.

I'm looking for a free php membership/subscription/client area script. I need it to run an private proxy website, and this it must have a payment section, that can I integrate with pay pal IPN.

And if we are here I also need a helpdesk script

Thank you guys for your response and hope to find the answer. I really need your help on this.

Hy.

Can any body help me with that?

Thank you