Alsvin Tech

This plugin allows you to display different kind of notifications to your site users, or show special information or alert messages on any specific page/post/product.
Features:
<ul>
<li>Display site wide notices</li>
<li>Display notices on any specific page/post/product</li>
<li>Choose from any four pre-defined color schemes/notification types</li>
<li>Extremely customizable, set your own color, icon, title and message</li>
<li>Display notices on six screen positions</li>
<li>Two animation styles</li>
<li>Instantly preview notices, to see how it looks on front-end</li>
<li>Easily customizable through CSS</li>
</ul>

Site Notices WP

Show notices, alert, popup, info messages on your WordPress site easily. Choose where to display notice on any single page/post/product or on complete …

rpetersen29

This plugin makes it easy to display a simple announcement banner or bar at the top of your website. You can easily customize the color of the links, text, and background of the bar from within the settings. You can also customize to your heart’s desire by adding your own custom CSS. There’s also a fancy preview section within the settings so you can see your changes before you save them.
<h4>Now with multi-banner support</h4>
With Pro features you can display up to 5 separate banners on your site. Banners can be shown simultaneously or plan weeks of banners by showing them consecutively.

Simple Banner – Easily add multiple Banners/Bars/Notifications/Announcements to the top or bottom of your website

The banners created are embedded within the html of the page, so if you enter your html correctly they will be tab-navigable and placed nicely in the content flow.

Very easy to use, instructions were clear, did what my client needed with no extra bells & whistles. 

good solution for simple accessible banner

Display a simple banner/bar at the top or bottom of your website. Now with multi-banner support.

Site Notices WP vs Simple Banner – Easily add multiple Banners/Bars/Notifications/Announcements to the top or bottom of your website