Luis Rock

Master Bar plugin offers an easy way to display a bar with any message on top of your WordPress website. You can choose different messages for logged and non-logged users. You can select where the bar will appear: homepage, pages, posts, custom post types. You can even opt to use a shortcode [masterbar] in the page where you want the bar to show. Select color, background-color, font-size, border and/or apply your custom css code. Use Google fonts. Choose to let users click to hide the bar. Translate it.

Master Bar

Display a bar with any message or notification on top of your WordPress website.

Dannie Herdyawan

Showing information or notes on top bar
Simply the easiest way to add a topbar to your website. This plugin adds a simple and clean notification bar at the top of your website, allowing you to display a nice message to your visitors as well as a custom link.
<a href="http://plugin.ciusan.com/239/ciusan-notification-bar/" rel="nofollow ugc">Ciusan Notification Bar</a>

Master Bar vs Ciusan Notification Bar