WordPress Aggregator Plugin can gather information from other sites and display them,use PHP or the Shortcode.The plugin use the standards of WordPress, non extra library; use <a href="http://simplepie.org/" rel="nofollow ugc">SimplePie</a> for parse feeds.
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Please visit <a href="http://www.loosky.net/?p=890" rel="nofollow ugc">the official website</a> for the latest information on this plugin.
Use following code with a PHP-Plugin or in a template, example <code>single.php</code>, for WordPress:
Example for function:

Example for Shortcode: 
[WPAggregator perpage=6 maxto=6 istruncate=’true/false’ truncatedescchar=600 truncatedescstring=’…’ date_format=” target = ‘_blank’] 
_ 
For boolean parameter($istruncate) it is possible to use the string ‘true’ or ‘false’.
The plugin have many parameters for custom import and display content form feeds. See the list of parameters. You can also use all parameters with shorcode in posts and pages.
$perpage: Each page display how many items,default is ‘6’ 
$maxto: Most show how many pages,default is ‘6’ 
$istruncate: (bool)truncate content or not,default is ‘true’ 
$truncatedescchar: truncate content, number of chars, Default is ‘600’ 
$truncatedescstring: string after truncate content, Default is ‘ … ‘ 
$date_format: your format for the date, leave empty for use format of your WordPress installation, alternativ give the php date string, Example: ‘F j, Y’; see also:https://codex.wordpress.org/Formatting_Date_and_Time 
$target: string with the target-attribut, Default is ‘_blank’; use ‘_blank’, ‘_self’, ‘_parent’, ‘_top’

WordPress Aggregator

WordPress Aggregator Plugin can gather information from other sites and display them.

KillBait

Easily send URLs to Killbait news aggregator for selected categories and languages. 
This plugin integrates seamlessly with WordPress to automate the process.
<h3>External services</h3>
This plugin connects to the KillBait API to send the URLs of the posts from your site that you want to be published on KillBait. 
Each time a post is sent to KillBait, the URL of your post, the language code (“en” or “es”) in which you want your post to be shared on KillBait, and your API key for authentication with the KillBait API are sent. 
For more detailed information, refer to the <a href="https://killbait.com/api/doc" rel="nofollow ugc">KillBait API documentation</a>. 
This service is offered under the following <a href="https://killbait.com/legal/legal-advise" rel="nofollow ugc">terms of use</a> and <a href="https://killbait.com/legal/privacy-policy" rel="nofollow ugc">privacy policy</a>.

KillBait URL Sender

This plugin sends URLs of new posts to KillBait news aggregator for selected categories.

WordPress Aggregator vs KillBait URL Sender