S Hetjens

This plug-in redirects requests to the main or comment feeds, and only theses two, to Feedburner or a similar service. In comparision to the original Feedsmith-plug-in is has three advantages:
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It redirects only the two main feeds of the blog and not all. The category, tag and author feeds are still accessible
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If you need access to the original blog feed you can add the URL parameter “noredirect” (i.e. /feed/?noredirect) to your feed address and it will not forward your request.
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The Plugin is more integrated into the administration interface. It adds its settings to the default “reading” settings pages and do not create an own page.
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Hetjens Feed Redirect

This plug-in redirect reqests to the main or comment feed of the blog to Feedburner or a similar service.

Shrinivas

Super Share wordpress social plugin by MasterBlogster shows the social sharing buttons in a popup box only when reader reaches the end of the article. It also contains a Feedburner subscription form.
Here is the <a href="http://masterblogster.com" rel="nofollow ugc">live demo of Master Blogster Super Share plugin</a>
Plugin homepage: http://masterblogster.com/plugins/super-share-wordpress-plugin
 [It is highly recommended to update the plugin to the latest version i.e. 1.1]

Super Share

Super Share wordpress social plugin by MasterBlogster shows the social sharing buttons in a popup box only when reader reaches the end of the article.

Hetjens Feed Redirect vs Super Share