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

danikoo

NEW: 
1. added – option to choose multiple post types, example: ?call_custom_simple_rss=1&csrp_post_type=page,post 
2. added – option to choose multiple post status, example: ?call_custom_simple_rss=1&csrp_post_status=publish,draft 
3. added – better documentation (tutorial).
A plugin to create a your own Custom Simple RSS Feed 
according to parameters you choose!
*** the best solution for using MailChimp RSS campaigns ***
in simple words: 
Ever wanted an rss feed for just a specific Author and specific Category?
Or Even an rss feed for a specific Custom Field ???
Well… now you got it !
The plugin does not alter your default wordpress feeds – it enables you to display feeds on the fly via specific url with pre defined url query parameters.
for example:
display only 5 items from specific category order by name descending:
www.yordomain.com/?call_custom_simple_rss=1&csrp_posts_per_page=5 
&csrp_orderby=name&csrp_order=DESC&csrp_cat=4
Filter items by:
<ul>
<li>category id</li>
<li>post type</li>
<li>post status</li>
<li>tag</li>
<li>range of dates</li>
<li>and even meta keys and values!</li>
<li>NEW! filter by custom taxonomy</li>
</ul>
Order by:
<ul>
<li>name</li>
<li>date</li>
<li>author</li>
<li>ID</li>
<li>etc</li>
</ul>
More Features:
<ul>
<li>number of items to return</li>
<li>pagination </li>
<li>show post thumbnail or not?</li>
<li>set post thumbnails size to display?</li>
<li>show post custom fields (espically usefull if your using your rss as an affliate feed)</li>
<li>filter by date published or modified</li>
</ul>

Custom Simple Rss

A plugin to create your own Custom Simple RSS Feed according to parameters you choose

AideRSS WordPress Plugin vs Custom Simple Rss