Paul Kevin

Hubloy

Memberships by Hubloy gives you all the tools you need to start, manage, and grow your membership site. 
Users have full control of their membership and subscription on your site.
<a href="https://hubloymembership.com/docs/" rel="nofollow ugc">Documentation</a>
<h4>Member Experience Features</h4>
<ul>
<li>Frontend Log In</li>
<li>Frontend User Registration</li>
<li>Frontend Password Recovery</li>
<li>Frontend Profile Editing</li>
<li>Membership Account Dashboard</li>
<li>Membership Invoices and Billing Information Pages</li>
<li>Custom Emails</li>
<li>Custom Page Templates</li>
</ul>

Memberships by Hubloy – Manage memberships and subscriptions

A very useful plugin for membership management.

Simple and Solid

The best WordPress Membership Plugin. Restrict content, create rules, collect payments and more.

Pascal Casier

Swiss knife Toolkit for bbPress. Set global options and style your forums.
Swiss knife tweaking and hacking Toolkit for bbPress. Set global options and style your forums.
Current features:
<ul>
<li>Mentions (email someone by using the @username)</li>
<li>Forum and Topic subscription management for keymasters and moderators</li>
</ul>
And also:
<ul>
<li>Close/Protect forums to new topics (only replies on current topics allowed)</li>
<li>Close/Protect profile information so non-logged-in users cannot see them</li>
<li>Use TinyMCE editor for topics and replies to add basic HTML</li>
<li>Remove or change informational messages, descriptions and breadcrumbs</li>
<li>Auto tick the ” Notify me of follow-up replies via email ” when giving a reply</li>
<li>Move the ” Subscribe ” option of a forum to the right, not directly after the breadcrums</li>
<li>Do not grey out closed topics</li>
<li>Inverse the replies order (most recent on top)</li>
<li>Do not show the table with the list of subforums when in a forum</li>
<li>Remove bbPress css stylesheet from all pages except forum pages</li>
<li>Basic System Info (for support personnel)</li>
<li>Translation ready ! https://translate.wordpress.org/projects/wp-plugins/bbp-toolkit</li>
<li>No email sending to blocked users</li>
<li>Add search on all pages</li>
<li>And more … (see changelog)</li>
</ul>
See the screenshots for all what can be done !
Consider also the following plugins:
<ul>
<li>bbP Move Topics</li>
<li>bbP API</li>
</ul>
Special thanks to Robkk for his input in the codex! 
And thanks to Viktor Szépe for his svn-updater idea.

bbPress Toolkit

It is a very usefull plugin, but it has no support!
It has also a bug and it doesn't subscribe new registered users

Usefull but with No support

Swiss knife tweaking and hacking Toolkit for bbPress. Set global options and style your forums.

Memberships by Hubloy – Manage memberships and subscriptions vs bbPress Toolkit