Daryll Doyle

This plugin will allow you to specify a custom news feed to display in widget on the admin dashboard. This works in unison with the <a href="https://wordpress.org/plugins/dashboard-custom-feed-admin/" rel="ugc"><code>Dashboard Custom Feed Admin</code></a> plugin which creates the feed.
This is mainly useful for notifying all your clients of something through their wordpress dashboard, whether that be a link to a new blog you’ve written or a notification asking everyone to upgrade their versions of wordpress. It’s really up to you what you show in there.

Dashboard Custom Feed

Retrieves a custom news feed and displays it in a widget on the admin dashboard

elebail

Creates 4 feeds :
trdf => rdf in theme (template : feed-rdf.php)
trss => rss 1.0 in theme (template : feed-rss.php)
trss2 => rss 2.0 in theme (template : feed-rss2-comments.php and feed-rss2.php)
tatom => atom in theme (template : feed-atom-comments.php and feed-atom.php)
Those feeds look for a feed template into the theme directory. 
If no template is found into the theme directory the feed uses the default wordpress feed template.
This plugin has been tested with WP2.6.5, WP2.8.4 and WPmu2.8.4
<h3>Update Log</h3>
1.0.1 : Performance improovment.
1.0.0 : Test under WP2.6.5, WP 2.8.4, WPmu2.8.4
0.0.1 : plugin initial creation.

Dashboard Custom Feed vs Feeds in Theme plugin