Jonathan Bardo

Note: This plugin only works with WordPress 4.2 or higher
This plugin will enable the site administrator to easily create an admin message present on all pages. The admin has the option to let the user dismiss the message for the duration of his session.

Admin User Message

This does just what I want. Thanks for making it. :)
It's definitely better than https://wordpress.org/plugins/admin-screen-messages
You might want to also tag it as:
https://wordpress.org/plugins/tags/admin-message



Perfect

Add message to users of your site. Choose wheter they can dismiss it or not.

www.gopiplus.com

gopiplus

This plugin will create a vertical scroll continuous announcement for your wordpress website.
Check official website for live demo <a href="http://www.gopiplus.com/work/2010/09/04/continuous-announcement-scroller/" rel="nofollow ugc">http://www.gopiplus.com/work/2010/09/04/continuous-announcement-scroller/</a>
<ul>
<li><a href="http://www.gopiplus.com/work/2010/09/04/continuous-announcement-scroller/" rel="nofollow ugc">Live Demo</a> </li>
<li><a href="http://www.gopiplus.com/work/2010/09/04/continuous-announcement-scroller/" rel="nofollow ugc">More info</a> </li>
<li><a href="http://www.gopiplus.com/work/2010/09/04/continuous-announcement-scroller/" rel="nofollow ugc">Comments/Suggestion</a> </li>
<li><a href="http://www.gopiplus.com/work/" rel="nofollow ugc">About author</a> </li>
</ul>
Continuous announcement scroller wordpress plugin create an announcement widget in the website, it’s not a simply message display instead the message will scroll vertically from bottom to top like roller and many message display at the same time. This plugin will support multilingual content. There is separate text management page available in the dashboard to add the announcement content.
Features of this plugin
<ol>
<li>Easy installation. </li>
<li>Widgets, so you can add pretty much anything. </li>
<li>Easy scroller setting. </li>
<li>Can arrange the message order easily(see faq).</li>
<li>Can disable the message temporary. </li>
<li>Option to control scrolling speed and delay.</li>
</ol>

Continuous announcement scroller

This plugin will create a vertical scroll continuous announcement for your wordpress website.

Admin User Message vs Continuous announcement scroller