Ben Ward

Protect your content with Levels. Levels can protect Posts, Pages and Categories. 
Levels are not sequential, they are more like groups. 
Currently the Payment gateways are non-functional due to stripping out the copy-protection during the open sourcing process. 
These will be restored over time, including: PayPal, Authorize.net and Google Checkout.
The primary repository for Free WP-Membership is at <a href="https://github.com/Foran/free-wp-membership" title="Free WP-Membership main repository" rel="nofollow ugc">GitHub</a>. 
The project home page is at <a href="http://free-wp-membership.foransrealm.com" title="Free WP-Membership project home page" rel="nofollow ugc">Free WP-Membership</a>.
<h3>Minimum Requirements</h3>
<ul>
<li>PHP 5.3.0</li>
<li>Curl (Used to update News & Info)</li>
<li>Simple Xml</li>
<li>MySql 5</li>
<li>To Be Determined</li>
</ul>

Free WP-Membership Plugin

Allows the ability to have a membership based page and post restrictions.

AAM Plugin

Advanced Access Manager (AAM) introduces Access Governance for WordPress – a systematic approach to securing your site by controlling who can access what, when, and why.
Most WordPress security plugins focus on external threats like malware, firewalls, and brute-force attacks. AAM addresses the root cause of the #1 WordPress security risk: broken access controls, excessive privileges, and misconfigured roles.
Instead of reacting to attacks, AAM helps you design security into your WordPress site.
<h4>What Access Governance means in practice</h4>
<ul>
<li>Mitigate Broken Access Controls. Ensure roles, users, and permissions are correctly configured to prevent unauthorized actions and privilege escalation.</li>
<li>Eliminate Excessive Privileges. Identify overpowered users and reduce access to critical functionality, admin areas, and APIs.</li>
<li>Secure Content by Design. Control who can view, edit, publish, or delete posts, pages, media, taxonomies, and custom content types.</li>
<li>Govern Access with Policy. Define access rules using JSON Access Policies — portable, auditable, and automation-friendly.</li>
<li>Build Custom Security Logic. Use the AAM PHP Framework to create advanced, programmatic access controls tailored to your application.</li>
</ul>
<h4>Key Features</h4>
<ul>
<li>Security Audit. Detect risky role assignments, misconfigurations, and compromised accounts.</li>
<li>Granular Access Control. Manage permissions for any user, role, or visitor with precision.</li>
<li>Role & Capability Management. Customize WordPress roles and capabilities beyond defaults.</li>
<li>Admin & Menu Control. Restrict dashboard areas and tailor the admin experience per user or role.</li>
<li>API & Endpoint Protection. Secure REST and XML-RPC access with fine-grained controls.</li>
<li>Modern Authentication Options. Support passwordless and secure login flows.</li>
<li>Developer-Ready Framework. Extend WordPress security using AAM’s powerful SDK.</li>
<li>Ad-Free & Transparent. – No ads, no tracking, no bloat.</li>
</ul>
<h4>Built for Security-Conscious WordPress Users</h4>
AAM is trusted by 150,000+ websites to deliver enterprise-grade access control without unnecessary complexity. Whether you’re a site owner, agency, developer, or security professional, AAM gives you full control over WordPress access — by design.
Most core features are free. Advanced capabilities are available via premium add-ons.
No hidden tracking. No data collection. No unwanted changes. 
Just security you can reason about, audit, and trust.

Advanced Access Manager – Access Governance for WordPress

This plugin made it so easy to create accounts for coworkers who only need to do one or two tasks on a website and it's so easy to do. :) 

I love this plugin!

Use at your own risk as the plugin author @vasyltech never replies to support messages on here.

No support

Access Governance for WordPress. Control roles, users, content, admin areas, and APIs to prevent broken access controls and excessive privileges.

Free WP-Membership Plugin vs Advanced Access Manager – Access Governance for WordPress