petitnuage

This widget displays titles and links to the latest posts of a custom list of third party RSS feeds. It is useful for people who want to follow third party feeds updates on their own blog. It is also useful for blog networks where each blog can promote the latest posts of other blogs of the network.
Features list:
<ul>
<li>Customizable title.</li>
<li>Customizable introduction displayed before the recently updated feeds list.</li>
<li>Customizable number of maximum posts displayed from the same source.</li>
<li>Customizable number of maximum posts displayed in total.</li>
<li>Localized economy and market share news feeds supplied by default for immediate use (many thanks to <a href="http://www.labourseenaction.fr/" title="La bourse en action" rel="nofollow ugc">Bourse en ligne</a> for both English and French original news feeds).</li>
</ul>
Languages supported:
<ul>
<li>English</li>
<li>French</li>
</ul>
The plugin uses WordPress standard localization functions for localization. So, adding support for new languages (including the list of default RSS feeds, separated by “!”) should be straightforward.

Simple RSS Feeds Widget

This widget displays links to the latest posts of a custom list of third party RSS feeds.

ringmaster

This plugin performs the simple task of replacing individual author names in feeds with the site name.
This is useful for blogs that are written by multiple authors that have the “authoritative voice” of the blog itself, 
rather than attributing each post to its individual author. This plugin makes the posts in the feeds (all feeds: rss, 
rss2, atom, rdf, etc) appear to be written anonymously, instead using the name of the site as the publishing author, 
rather than the name of the author. This prevents admins from having to edit core files to make posts in the feed anonymous.

Feed Anonymizer

Replaces individual author names in feeds with the site name.

Simple RSS Feeds Widget vs Feed Anonymizer