denishua

AideRSS is a service that helps you to prioritize news feeds based on the amount of social activity around them. Using an algorithm called PostRank, which tracks the number of comments, Digg votes, del.icio.us bookmarks and more, it will process any feed you enter and spit out feeds of All Posts, Good Posts, Great Posts, Best Posts and the Top 20.
AideRSS have released API and PHP Class. Base on the PHP Class, I create a simple WordPress plugin which can display the top posts for the specified time period.

AideRSS WordPress Plugin

Show the top posts for your WordPress blog base on AideRSS

s-feeds

followit

Try it out on your free dummy site: Click here => <a href="https://tastewp.com/plugins/feedburner-alternative-and-rss-redirect" rel="nofollow ugc">https://tastewp.com/plugins/feedburner-alternative-and-rss-redirect</a>. 
(this trick works for all plugins in the WP repo – just replace “wordpress” with “tastewp” in the URL)
This plugin allows you to easily switch from Feedburner to the FREE (on the <a href="https://follow.it/features-and-pricing" rel="nofollow ugc">basic plan</a>) and better Feedburner alternative follow.it.
Read more why follow.it is the <a href="https://follow.it/?page=3" rel="nofollow ugc">better Feedburner alternative</a>.
The plugin is very easy to use:
<ul>
<li>Step 1: Download, install & activate it</li>
<li>Step 2: Click on “Apply redirect” for all feeds you want to redirect (most likely your main feed, as well as some comments & author feeds you may have)</li>
<li>Step 3: Connect it to a follow.it account to get access to your subscribers, see statistics etc. (see screenshots)</li>
</ul>
Once the redirect is active, your RSS-url will redirect to your new feed page where users can subscribe to your feed.
If you had former Feedburner subscribers, follow the steps as prompted in the plugin to move them over to your new feed (RSS as well as Email subscribers).
If something is not working in the Feedburner alternative plugin, please post a question in the support forum. Thank you!

RSS Redirect & Feedburner Alternative

Free Feedburner Alternative and RSS Redirect plugin from follow.it.

AideRSS WordPress Plugin vs RSS Redirect & Feedburner Alternative