Al Mithani

Do you love Reddit-style comments? Do you submit your blog post to Reddit only to find the discussion there is much more active than the one at your own blog? Do you wish you could show Reddit comments as they appear on Reddit on your own blog post?
With ReddiComments, you can! ReddiComments allows you to use a simple shortcode to embed ANY Reddit discussion in your blog posts.
Step 1: Submit your blog post to Reddit 
Step 2: Add this shortcode at the bottom of your blog post:
[reddiComments link=”http://link_to_your_comment_page_on_reddit”]
Step 3: Sit back and join the conversation on Reddit!
Please note: to get the Reddit comments, this plugin makes an external call to an API hosted at http://reddicomments.com. The only information it sends this API is the link that you provided – no private information is ever sent to or from the ReddiComments plugin.

ReddiComments

Allows you to easily add any Reddit comment page into your blog post via a shortcode.

johnlawrence

PopuList allows you to track the popularity of your posts on social bookmarking sites reddit, stumbleupon, del.icio.us and digg. When PopuList is activated, a page is added to your dashboard giving the number of times a page has been saved or upvoted.
New in version 1.5 PopuList now also lets you view backlinks as indexed by Google and Yahoo.

Populist

Track the popularity of your posts on social bookmarking sites reddit, stumbleupon, del.icio.us and digg

ReddiComments vs Populist