No future development is planned for this plugin.
Create an alert notification bar anywhere in your website. Place the shortcode in a page, post, widget or template file one time. Then use the Alert post function in the dashboard to create and edit alerts, which will appear wherever you’ve placed the short code.
This plugin uses a custom post type to generate the alert so editing the alert is as easy as creating a post or page. This is an intentionally light weight plugin (no jquery or javascript of its own) that aims to avoid theme or plugin conflicts.
Install the plugin. Embed the shortcode in a page or post as <code>[fiatalert]</code> or in a template file <code><?php echo do_shortcode 
('[fiatalert]');?></code>.
Create an alert in the WordPress dashboard using the new Alerts custom post type. The content or body of the alert will appear where you have placed the shortcode. WYSIWYG styling will be passed through (including text align center and links).
If you create multiple alerts only the most recent one will be displayed. If you do not want any alert displayed then change the status of each alert to “draft”.

Alert Bar

Create an alert bar that can be edited like a normal post and placed anywhere in your site via the [fiatalert] shortcode.

Ryan Bracey

WP Alert Bar allows you to quickly and easily add an alert bar to your WordPress website.
All content and styles are fully customizable through the WordPress Customizer, allowing you to easily match the alert bar to your sites branding with no coding necessary, and with real time preview you can see what you’re doing before publishing. WP Alert Bar also gives you the ability modify the way the alert bar displays with options to have the alert bar appear across your entire site or just the homepage, or include a close button. This gives you the power to use WP Alert Bar in a way that best fits your message.
WP Alert Bar also applies unique classes to the body tag and all elements of the alert bar making it easy for developers to further modify the styles to fit the needs of your WordPress website.
<h3>Features</h3>
<ul>
<li>Custom Colors to match your site branding</li>
<li>Custom title, message and call to action ( all items are optional and fully conditional )</li>
<li>Ability to display banner across your entire site or just the homepage</li>
<li>Body class added to pages where WP Alert Bar is visible</li>
</ul>

WP Alert Bar

Fully customizable alert bar for your WordPress website.

Alert Bar vs WP Alert Bar