nickiler

WordPress users logon seamlessly via jsConnect and SSO into your Vanilla Forums. Just install <a href="http://vanillaforums.org/addon/jsconnect-plugin" rel="nofollow ugc">jsConnect</a> addon in Vanilla, then copy links and codes from WP to jsConnect and your linked up. Takes about 5 minutes to download and install.
I built this for myself and decided to polish it up for open source release. None of the current methods for linking Vanilla and WordPress work for my server and DNS setup. I will follow the jsConnect project 
and incorporate updates as I get notified.
This plugin relies completely on jsConnect and cannot modify any parts of Vanilla what-so-ever. If you need special features 
in Vanilla than this plugin will not work for you. However, if your looking for a simpler way to get your wordpress users 
logged into a Vanilla forums without hacking up your code files, this is the right plugin for you.
jsConnect Features:
<ul>
<li>Authenticate WordPress Users in Vanilla forums similar to Facebook Connect.</li>
<li>Cross-domain authentication and can be used on different servers.</li>
<li>Easy to install and setup.</li>
</ul>
WP Vanilla Connect Features:
<ul>
<li>Seamless WordPress integration with autologin via login URL.</li>
<li>Automatically generates URL’s for jsConnect (Vanilla’s recommended method in place of ProxyConnect).</li>
<li>Attach Gravatar’s to users instead of the default image if their email address is registered on Gravatar.com. Has an option to serve over SSL and Non-SSL.</li>
<li>Easy to install and setup, takes less than two minutes.</li>
<li>Compatible with WordPress Standard and Muti sites.</li>
<li>Don’t have to hack up WordPress and Vanilla config and template filee, which are bound to break on any future platform updates.</li>
</ul>

WP Vanilla Connect

This plugin allows your WordPress users to authenticate and login to Vanilla forums like Facebook Connect.

Dominique Moody

This is a very simple contact form plugin that uses the wp_mail() function to send messages. The form is styled using Bootstrap 4 CSS, so it will visually fit well with many WordPress themes that use some of the default Bootstrap styles.

Vanilla Contact Form

A very simple contact form plugin. Features Bootstrap 4 styling.

WP Vanilla Connect vs Vanilla Contact Form