Ismail

bbPress Contacts allows you to add contact and bookmarking customizable buttons (add contact/remove contact) to bbPress profiles, and in the forums below topics and replies author details.
These buttons will permit logged in members to add this user as contact or remove them as contact.
A contacts section is added to the bbPress profile of current user, allowing them to:
<ul>
<li>View bookmarked users and contacts</li>
<li>Search these users</li>
<li>Quick removing a contact with a small cross button</li>
<li>Paginating through these results.</li>
</ul>
Also, AJAX can be enabled (enabled by default) to process buttons faster, and process the search, pagination and list the available contacts in the bbPress profile page.
You can set it up the way you want, bbPress Contacts is translation-ready and easy to customize, so you can possibly rename “Add Contact” to “Bookmark” or “Add as Friend”, etc.
I will write a blog post about using and customizing this plugin. Be sure to check https://blog.samelh.com
This project is also available on Github, fork it from there, or open new issues for bug reporting, or feature suggestion, or imporvement.
<ul>
<li>
See my other <a href="https://codecanyon.net/collections/5612972-bbpress-plugins" rel="nofollow ugc">bbPress premium plugins</a>
</li>
<li>
<a href="https://samelh.com/work-with-me/" rel="nofollow ugc">Hire me</a> for a custom bbPress plugin
</li>
</ul>
More docs coming soon.

bbPress Contacts

Works well for adding bookmarks feature to your bbPress forums. 

Works Well

Allow your bbPress users to bookmark other users easily and view/search them through their bbP profiles.

FuseForms

FuseForms MailChimp Integration for WordPress is the easiest way to sync your contacts from your forms to a MailChimp list of your choosing.
<h4>How it Works</h4>
FuseForms automatically hooks into your existing forms on your site and syncs them to a MailChimp list of your choosing.
FuseForms works with:
<ul>
<li>Most custom forms</li>
<li>Contact Form 7</li>
<li>Gravity Forms</li>
<li>Formidable</li>
<li>Ninja Forms</li>
<li>JetPack</li>
<li>Fast Secure Contact Form</li>
<li>Contact Form</li>
<li>Contact Form Clean and Simple</li>
<li>Quform</li>
<li>Native WordPress comment forms</li>
</ul>
FuseForms doesn’t work with:
<ul>
<li>Forms contained in an iFrame</li>
<li>Wufoo</li>
<li>WooCommerce</li>
<li>FormCraft</li>
<li>Easy Contact Forms</li>
<li>JotForm</li>
<li>Ninja Popups</li>
<li>SumoMe</li>
<li>Jetpack comments</li>
<li>Disqus comments</li>
</ul>

MailChimp Integration for WordPress

FuseForms MailChimp Integration for WordPress is the easiest way to sync your contacts from your forms to a MailChimp list of your choosing.

bbPress Contacts vs MailChimp Integration for WordPress