Checkout by Amazon now works without leaving your site
payments.amazon.com
payments.amazon.com
Edit: Looks like authentication is entered into a pop-up window, but still I'm not convinced that it's secure.
If you meant that this site should somehow provide a payment button for all those providers without even opening an account with them, that's not a problem you can solve with technology. Know-your-customer banking laws and factoring clauses in merchant agreements mean you can never create that service.