This will enable ranking of your posts by popularity using the behavior of your visitors to determine each post's popularity. That Plugin is base
Enables Popularity statistic of articles.
this Plug-In is compatible to Popularity Contest Plug-In. Yo can switsch it enytime without probelem. But ist NOT RECOMMENDET to use them simultaniosly!!!
Since Popularity Contest hooks into the WordPress code that actually displays post content, any caching plugin (like WP-Cache) will affect the ability of Popularity Contest to accurately record views.
Popularity Contest uses the WordPress hooks to know when a new post has been added and those hooks are not included in the XMLRPC posting code. When the XMLRPC posting code is updated to include the WordPress posting hooks, Popularity Contest will work as expected when posting from an external blog client.