eisenivan

A lightweight plugin that allows you to place a sitewide alert message in the header of your site. There are options to include a default set of styles (based on Twitter Bootstrap), center your alert, and switch the style class.

Summits Alert

A lightweight plugin that allows you to place a sitewide alert message in the header of your site.

codee47

The Apollo Bar is a really simple announcements and notification plugin. Used with Custom Post Type to publish announcements and a sort jQuery code to rotate messages with fade animation. The close button in the plugin information stored in a cookie, which the browser window is closed will be deleted.
There is a very simple administrative interface. Can be switched off and on the Apollo Bar, author logo and close button or you can choose the background and text color.
Available languages:
<ul>
<li>English</li>
<li>Hungarian</li>
<li>Turkish (Fatih Toprak)</li>
<li>Japanese (Akky Akimoto)</li>
</ul>
More translations are welcome.

Apollo Bar

Apollo Bar is a simple announcements plugin that allows you to create colorful notification bars for your website.

Summits Alert vs Apollo Bar