DZVO

This plugin allows you to display a buttons which shows the voting for a social news message (digg,sphinn …) on your blog post. 
You will find a collection of voting buttons for different social-news-services <a href="http://www.zauberpage.de/vote-it-liste.html" rel="nofollow ugc">here</a>.

Vote It!

Vote It! Buttons for Blogpostings. Set very simple a digg, sphinn or another social-news-button in your blogpost.

paulmac

Uses a short javascript to remove any containing frames around your WordPress site. The Digg toolbar now adds frames to sites, affecting site owners traffic stats and SEO. Using “WP Frame Breaker” will force your site out of the Digg containing frame.

WP Frame Breaker

Adds a short javascript to your blog header to break out of any containing frames

Vote It! vs WP Frame Breaker