Pippin Williamson

A simple plugin that adds a notification system to your WordPress. Via custom post types, Simple Notices gives you a way to make announcements that are displayed site-wide at the top of your site.
Notices are displayed with fixed positioning, meaning that they will overlap the rest of your site’s contents. Each notice includes a close button that allows the current user to hide the notice. If the user is logged in, the notice ID will be permanently stored in their user meta, and so will never shown again. If the user is not logged in, the ID of the notice will be stored in a cookie.
Notices can be set to only be shown to logged-in users.
Five colors are included:
<ul>
<li>Blue</li>
<li>Red</li>
<li>Orange</li>
<li>Green</li>
<li>Gray</li>
</ul>
Go to the <a href="http://pippinsplugins.com/simple-notices-plugin" rel="nofollow ugc">plugin’s home page</a> for a demonstration video.

Simple Notices

A simple plugin that adds a notification system to your WordPress. Via custom post types, Simple Notices gives you a way to make announcements that ar …

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This plugin to show announce for per user roles.
And, if you want to change plugin capability, please refer to this code.
For example add filter:
<pre><code>function afd_custom_change_capability( $capability ) {
 // plugin minimum capability
 $capability = 'edit_posts';
 return $capability;
}
add_filter( 'afd_capability_manager' , 'afd_custom_change_capability' );
</code></pre>
And, if you want to add filter, please refer to this code.
For example add filter:
<pre><code>function afd_custom_filter( $announces ) {
 // filter
 return $announces;
}

add_filter( 'afd_before_announce' , 'afd_custom_filter' );
</code></pre>
<h3>日本語でのご説明(Japanese description)</h3>
このプラグインは、ダッシュボードにお知らせを表示するプラグインです。 
ユーザーの権限グループ別に、編集者のみへの表示、 
投稿者と寄稿者と購読者のみに表示する設定もできます。

Simple Notices vs Announce from the Dashboard