Dana Ross

Widget that displays on your WordPress search results page with similar items from your Flickr, YouTube, and Twitter feeds.
For example, someone searching for “cat” on your site might see Flickr photos you’ve tagged with “cat”, or that funny YouTube video you took of your kitty the other day.
Currently searches: * Flickr * Twitter * YouTube
…or any combination of the above!
View the announcement for this plugin at http://www.slideshare.net/fvcp/wpexternalsearch

Dave’s External Search

Widget that displays on your WordPress search results page with similar items from your Flickr, YouTube, and Twitter feeds.

Kieran O'Shea

A simple plugin that nicely formats content imported to your blog from social 
media sites such as YouTube and Flickr
Features:
<ul>
<li>Works without user interaction or a requirement to change admin panel settings</li>
<li>Currently supports YouTube and Flickr</li>
</ul>

Social View

A simple plugin that nicely formats content imported to your blog from social media sites such as YouTube and Flickr

Dave’s External Search vs Social View