jannesh

HS Membership plugin add onto the already extensive s2Member. It provides additional functionality including:
<ul>
<li>The ability to disable the creation of blogs for Multi-Site installations, based on Membership Level. </li>
<li>New redirect to a ‘Login Required’ page, to promt the user to login first before he can browse the contents of the blog. This is 
required for older installs and upgrades from WPMU 2.9.</li>
<li>New meta-box feature added to allow the author to set the Access Level of a Page/Post directly from the edit page.</li>
</ul>
This plugin requires the following to ensure full functionality:
<ul>
<li>WordPress Multi-Site: 3.0.0, tested up to 3.2.1</li>
<li>s2Member: 3.1.2, tested up to 110815</li>
</ul>
<h3>Future Releases</h3>
No future releases currently planned.

HS Membership Plugin

Addon plugin to s2Member. Additional functionality for Multi-Site Installations. s2Member 3.1.2 required.

wp.insider

smp7

This addon allows you to specify a MailChimp list name for each of your access levels. When members join your site, they get signed up to the specified MailChimp list.
This addon requires the <a href="https://wordpress.org/plugins/simple-membership/" rel="ugc">simple membership plugin</a>.
After you install this addon, edit your membership level and specify the mailchimp list name. Then go to the MailChimp settings interface and specify your API Key.
Read the following page for step by step usage documentation: 
https://simple-membership-plugin.com/signup-members-mailchimp-list/

Simple Membership MailChimp Integration

An addon for the simple membership plugin to signup members to your MailChimp list

HS Membership Plugin vs Simple Membership MailChimp Integration