What is the Best Membership Plugin For WordPress?

What is the Best” Free” Premium Membership Plugin For WordPress?
note: S2Member is only supports paypal.
Others which are supports much more gateways are not free.

And also it must be provide adult payment gateways like ccbill, verotel, zombaio, paxum etc… Which plugin is the best?

Note: It must also have content locking/hiding function in a post…