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.

sagie

WordPress Tumblr AJAX Widget creates a widget you can use in your blog that would draw posts from a Tumblr blog feed and
<h3>Readme Generator</h3>
This Readme file was generated using <a href='http://sudarmuthu.com/projects/wp-readme.php' rel="nofollow ugc">wp-readme</a>, which generates readme files for WordPress Plugins.

WordPress Tumblr AJAX Widget

Simple plugin that launches an AJAX call to a selected Tumblr blog and displays the last couple of posts.

WordPress Aggregator vs WordPress Tumblr AJAX Widget