WP RSS Aggregator helps you create a feed reader/aggregator on your WordPress site. It works in a similar fashion to RSS readers like for example Google Reader. You can add any number of feeds through an administration panel, the plugin will then pull all the feeds from these sites, merge them and sort them by date.
The plugin uses SimplePie for the feed operations. You can call the function from within the theme or even use a shortcode with parameters.
Since the plugin uses Custom Post Types to store the imported feeds, you are also free to display them in any way you want, in a similar fashion as you would with other post types such as Posts or Pages.
Demo
The plugin can be seen in use on the WPMayor.com WordPress News page
Credit
Created by Jean Galea from WP Mayor