Default I need Membership module...

I have a simple but large html based site, publishing scientific data.
I do not know php or other asc...
If it is exist I would like to add a standard Membership Module with registration, password, login, forget password, etc options, to allow members access certain pages.

Anyone know where can I find a module like this?
I am ready to pay modest price for it if there is nofree options.

Thanks for your input