Membership Manager (15 days free trial, then 4.80 USD per month (you can cancel your future payments at any time))
Lifetime free upgrades, for all your websites!
By getting now Membership Manager, you will get all the future upgrades of this plugin for free for life, even when its price increases. This will allow you to benefit from new features in addition to many features included in the current version of Membership Manager. You can install it on each of your websites. You can also modify it for your personal use.