iNexi

<p>Restricts posts displayed on the home page to a specified length of time. Posts displayed via widgets or on any other page (archives, etc.) are unaffected. Options are in Settings > Reading.</p>


geegood.com

<p>The Random Featured Post plugin allows you to display a random post from a designated category. Ideally this should draw readers landing on your homepage to some of your best posts. The featured post will display the title “Featured Post” (customizable) along with the post’s title, an excerpt and a link to continue to the full post.</p>
<h3>Using it</h3>
<p>Please go here for now for documentation: http://geegood.com/wordpress/</p>


Show Category Posts Fade in/out

The Random Featured Post plugin allows you to display a random post from a designated category as a "featured" post.

Recent Posts Only vs Show Category Posts Fade in/out