Julian Yanover

Admin Msg Board is a plugin for WordPress that will add a messaging system in your WordPress admin area. This works for weblogs that are written by more than one blogger, so they can communicate with each other, without leaving the WP system. 
Messages can have up to 140 words like in twitter, and you can choose whether to write to all users or select recipients

Admin Msg Board

Adds a messaging system in your Wordpress admin area for bloggers to communicate.

mssg.me

The widget of a new era, it was never so easy to reach you in a messenger from the website.
<a href="https://mssg.me" rel="nofollow ugc">mssg.me</a> allows you to create a page with messengers for fast communication, and our Inbox allows you to receive messages from all instant messengers in one place.
<h4>Why it is better than live chat?</h4>
Usability 
The client should not be on the website and wait for your answer.
Conversion 
Communication with a real person in messenger increases purchase probability on more than 50%.
Promote in messengers 
Stay in touch with the client and make promotions in messengers.
<h3>Usage</h3>
After enabling the plugin, head on to the widget customization page to change settings and integrate its look and feel to match your site. When done, enable it by visiting the account configuration page and completing the instant signup process.

MSSG.ME Widget

Integrate your mssg.me online business card with your website.

Admin Msg Board vs MSSG.ME Widget